Dry EyePhase 4NCT02752763
Comparison of Autologous Serum Versus Preservative Free Artificial Tear
A Phase 4 study testing %40 diluted Autologous serum and Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop) in people with Dry Eye, run by Niğde State Hospital at 1 site in Turkey (Türkiye).
Trial summary
Dry eye is a significant adverse effect of isotretinoin causing patients to use ophthalmic medications. For this reason, many patients using isotretinoin are referred to ophthalmology clinic because of discomfort symptoms. Read more about this study
- Who is it for?
- Ages 18 to 35 years
- Conditions the study is for
- Dry Eye
- What is being tested?
- %40 diluted Autologous serum and Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop)
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- Oct 2015to Mar 2016
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- isotretinoin use for any reason
Who cannot join
- corneal pathologies such as dry eye illness before isotretinoin treatment
- previous cornea surgery, injury or keratitis
- active ocular infection
- meibomian gland dysfunction
- excessive allergic reaction that may be associated with dry eye
- glaucoma therapy use
Show all 9Show fewer
- severe anemia
- previously use of PFAT or AS for any reason
- (Hb<10 g/dL) and elevated hepatic function tests requiring withdrawal of therapy
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Niğde State Hospital
Niğde, Niğde Province, 51100
About this study
Official title: Comparison of Autologous Serum Versus Preservative Free Artificial Tear in Patients With Dry Eye Due to Systemic Isotretinoin Therapy
Dry eye is a significant adverse effect of isotretinoin causing patients to use ophthalmic medications. For this reason, many patients using isotretinoin are referred to ophthalmology clinic because of discomfort symptoms. In the literature, there are studies suggesting superiority of Autologous serum drops regarding effects on ocular surface when compared to artificial tear. In addition, Autologous serum was also used in several corneal pathologies with successful outcomes. No data regarding use in the ocular adverse effects of isotretinoin was found in the literature; however, investigators think that it may be an effective alternative in the treatment of dry eye developed during isotretinoin use due to positive effects on ocular surface, epithelial regeneration and anti-inflammatory effect. Autologous serum can be a choice of ophthalmologists in routine practice by increasing number of comprehensive studies investigating effectiveness, safety and long-terms effects of Autologous serum therapy.In this study, it was aimed to investigate dry eye development in the patients receiving systemic retinoic acid therapy and to compare effectiveness of Autologous serum and Preservative free artificial tear in the patients with dry eye disease.
Read the detailed description
This prospective, cross-sectional, double blind study was conducted by Ophthalmology Clinic on patients who have drye eye due to systemic isotretinoin treatment for several reasons in Niğde State Hospital between October, 2015 and March 2016. Patients determined as having drye eye during systemic isotretinoin treatment were included to our study. At baseline, 1.and 2. month of study, detailed ocular examination, best corrected visual acuity measurement, intraocular pressure measurement, Tear Break-Up time(TBUT)(5 µL of fluorescein sodium 2 % eye drops was used per each measurement using a pipette for standardization, and the mean value of two readings per patient was recorded) and Schirmer Test I (ST I) without topical anesthesia were performed. Effect on daily life was assessed by using Ocular Surface Disease Index (OSDI) score. TBUT<10 seconds, ST I <10 mm without local anesthesia, corneal and conjunctival staining was interpreted in favor of dry eye. In the follow-up period, investigators investigated the efficacy of autologous serum eye drops for the patients having dry eye illness during isotretinoin treatment. After informed consent, peripheral venous blood (14-20 ml) was drawn from antecubital vein of patients to prepare AS. Blood sample was left at room temperature over 2 hours for clotting. Serum was obtained after centrifugation at 4000 revolutions per minute (rpm) for 10 minutes at 4 °C using a centrifugal device(Nuve NF1200R). Next, in a laminar flow cabinet under sterile conditions, approximately 10 mL of supernatant was collected and diluted to 40 % with isotonic (0.9 % NaCl) saline solution and then 25 mL of preparation was aliquoted into 1.5-mL Eppendorf vials, each of which was wrapped with aluminum foil by the other specialist(Erkut Küçük) for protection against ultraviolet light (to prevent vitamin A degradation), and blinding the patients to the treatment. PFAT eye drops were also placed into different 1.5-ml Eppendorf vials and likewise wrapped with aluminum foil by the other specialist(Erkut Küçük) for blinding the patients. The droppers were also wrapped with aluminum foil for further blinding the patient while applying the eye drops. Patients were randomised via assigned laterality numbers and sealed regime envelopes by the other specialist(Erkut Küçük). Preservative-free isotonic saline was used for washout for 2 weeks prior to beginning of the study.
After the first treatment period (1 month) all patients underwent a 2-week washout period with isotonic saline (0.9 % NaCl) eye drops. Ten a new set of vials (AS or PFAT) was assigned to each patient by the other specialist(Erkut Küçük) for the second treatment period.
After the first 1-month treatment period, patients who had conventional PFAT treatment were switched to AS treatment and the patients who had AS treatment in the first 1-month treatment period were switched to conventional PFAT treat- ment in the second 1-month treatment period, according to the study's crossover nature. The examining ophthalmologist (Uğur Yılmaz) that performed tear function and ocular surface evaluations was blinded to the type of eye drops given to each patient. In addition, the patients were blinded to which treatment they were receiving.
Only the Other specialist (Erkut Küçük), who was not responsible for patient evaluation, knew which patient received which treatment during study periods. All patients were instructed to keep the vials (containing either AS or PFAT) in a refrigerator at 4 °C. All patients were advised to change the vial every other day during the treatment period. TBUT and ST I were administered by the same ophthalmologist (Uğur Yılmaz).
The study was approved Institutional Review Board of Erciyes University, Medicine School. The study was conducted in accordance to Helsinki Declaration. All patients gave written informed consent.
- Conditions
- Dry Eye
- Being tested
- %40 diluted Autologous serum, Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop)
- Keywords
- Dry eye, isotretinoin, AS, Autologous serum
- Medical subject headings
- Dry Eye Syndromes
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
%40 diluted Autologous serumDrug
Serum that obtained after centrifugation of blood sample
Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop)Drug
Also called Tears naturale free(hydroxypropyl methylcellulose), Refresh single dose(polyvinyl Alcohol + Povidone)
Preservative free artificial tears is a group naming for drops commonly used for drye disease
| Study group | Role | What they receive |
|---|---|---|
| preservative free artificial tear drop | Experimental | preservative free artificial tears drop is a drop group declaring different kind of active agent like hydroxypropyl methylcellulose, carboxymethyl cellulose etc commonly used in dry eye treatment. Preservative free artificial tear( carboxymethyl cellulose, hydroxypropyl methylcellulose) was used as four times one drop daily. In our study, we prescribed to patients preservative free artificial tears drop(hydroxypropyl methylcellulose or carboxymethyl cellulose) four times one drop daily. Receives: Drug: Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop) |
| %40 Autologous serum(AS) | Experimental | peripheral venous blood (14-20 ml) that drawn from antecubital vein of patients to prepare Autologous Serum. Blood sample was left at room temperature over 2 hours for clotting. Serum was obtained after centrifugation at 4000 revolutions per minute (rpm) for 10 minutes at 4 °C using a Nuve NF1200R. Next, in a laminar flow cabinet under sterile conditions, approximately 10 mL of supernatant was collected and diluted to 40 % with isotonic saline solution. It is recommended for dry eye diseases, too. %40 diluted Autologous Serum used as four times one drop daily. Receives: Drug: %40 diluted Autologous serum |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Schirmer Test I in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment
Schirmer Test I is used for Dry Eye evaluation before and after autologous serum or preservative free artificial tears treatment. Schirmer test is used to measure tear secretion. Schirmer strips are used for this test. Wetting of the paper is recorded in millimeter
Measured: up to 3 Months monthly measurements were done
Change in Break up Time in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment
fluorescein sodium eye drops was used for measurement of Break up Time. Value of Break up Time for per eye is recorded as seconds
Measured: up to 3 Months monthly measurements were done
Change in Ocular surface Disease Index in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment
OSDI score is a reliable and feasible test which is commonly used for dry eye patients to grade either dry eye symptom severity and its effect on vision-related function. In this index, people are asked to indicate whether they experienced any of the symptoms or problems due to drye eye, if so, how often. Every question asked to patients is scored from one to four according to the frequency of symptoms. The scores were collected from all the questions.
Measured: up to 3 Months monthly measurements were done
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Apr 2016 (estimated)
- Study startOct 2015
- Primary completionMar 2016
- Study completionMar 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for Dry EyeStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 24 participants (actual)
Sponsor and investigators
- Lead sponsor
- Niğde State Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Uğur Yılmaz, Niğde State Hospital
- Investigators
- Uğur Yılmaz, M.D., Study chair, Niğde State Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02752763
- Sponsor's protocol ID
- NSH 333
- Status last verified
- Apr 2016
- First submitted
- 31 Mar 2016
- Last updated
- 27 Apr 2016
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- Undecided
Publications
Oner AF, Ferahbas A, Karakucuk S, Utas S, Karaman B, Kutlugun C et al. Ocular side effects associated with systemic isotretinoin. Cutan Ocul Toxicol. 2005;23:189-195.
Egger SF, Huber-Spitzy V, Bohler K, Scholda C. [Isotretinoin administration in treatment of acne vulgaris. A prospective study of the kind and extent of ocular complications]. Ophthalmologe. 1995 Feb;92(1):17-20. German.
PubMed 7719068Tananuvat N, Daniell M, Sullivan LJ, Yi Q, McKelvie P, McCarty DJ, Taylor HR. Controlled study of the use of autologous serum in dry eye patients. Cornea. 2001 Nov;20(8):802-6. doi: 10.1097/00003226-200111000-00005.
PubMed 11685055Kojima T, Ishida R, Dogru M, Goto E, Matsumoto Y, Kaido M, Tsubota K. The effect of autologous serum eyedrops in the treatment of severe dry eye disease: a prospective randomized case-control study. Am J Ophthalmol. 2005 Feb;139(2):242-6. doi: 10.1016/j.ajo.2004.08.040.
PubMed 15733983Urzua CA, Vasquez DH, Huidobro A, Hernandez H, Alfaro J. Randomized double-blind clinical trial of autologous serum versus artificial tears in dry eye syndrome. Curr Eye Res. 2012 Aug;37(8):684-8. doi: 10.3109/02713683.2012.674609. Epub 2012 Jun 6.
PubMed 22670856
Study at a glance
From the registry record, last updated by the sponsor on 27 Apr 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Autologous Serum Versus Preservative Free Artificial Tear in Patients With Dry Eye Due to Systemic Isotretinoin Therapy
- ClinicalTrials.gov ID
- NCT02752763
- Acronym / sponsor ID
- NSH 333
- Conditions
- Dry Eye
- Keywords
- Dry eye, isotretinoin, AS, Autologous serum
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- Niğde State HospitalUniversity, hospital or other
- Study start
- Oct 2015
- Primary completion
- Mar 2016 (actual)
- Study completion
- Mar 2016 (actual)
- First posted
- 27 Apr 2016 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Dry eye is a significant adverse effect of isotretinoin causing patients to use ophthalmic medications. For this reason, many patients using isotretinoin are referred to ophthalmology clinic because of discomfort symptoms. In the literature, there are studies suggesting superiority of Autologous serum drops regarding effects on ocular surface when compared to artificial tear. In addition, Autologous serum was also used in several corneal pathologies with successful outcomes. No data regarding use in the ocular adverse effects of isotretinoin was found in the literature; however, investigators think that it may be an effective alternative in the treatment of dry eye developed during isotretinoin use due to positive effects on ocular surface, epithelial regeneration and anti-inflammatory effect. Autologous serum can be a choice of ophthalmologists in routine practice by increasing number of comprehensive studies investigating effectiveness, safety and long-terms effects of Autologous serum therapy.In this study, it was aimed to investigate dry eye development in the patients receiving systemic retinoic acid therapy and to compare effectiveness of Autologous serum and Preservative free artificial tear in the patients with dry eye disease.
Detailed description
This prospective, cross-sectional, double blind study was conducted by Ophthalmology Clinic on patients who have drye eye due to systemic isotretinoin treatment for several reasons in Niğde State Hospital between October, 2015 and March 2016. Patients determined as having drye eye during systemic isotretinoin treatment were included to our study. At baseline, 1.and 2. month of study, detailed ocular examination, best corrected visual acuity measurement, intraocular pressure measurement, Tear Break-Up time(TBUT)(5 µL of fluorescein sodium 2 % eye drops was used per each measurement using a pipette for standardization, and the mean value of two readings per patient was recorded) and Schirmer Test I (ST I) without topical anesthesia were performed. Effect on daily life was assessed by using Ocular Surface Disease Index (OSDI) score. TBUT<10 seconds, ST I <10 mm without local anesthesia, corneal and conjunctival staining was interpreted in favor of dry eye. In the follow-up period, investigators investigated the efficacy of autologous serum eye drops for the patients having dry eye illness during isotretinoin treatment. After informed consent, peripheral venous blood (14-20 ml) was drawn from antecubital vein of patients to prepare AS. Blood sample was left at room temperature over 2 hours for clotting. Serum was obtained after centrifugation at 4000 revolutions per minute (rpm) for 10 minutes at 4 °C using a centrifugal device(Nuve NF1200R). Next, in a laminar flow cabinet under sterile conditions, approximately 10 mL of supernatant was collected and diluted to 40 % with isotonic (0.9 % NaCl) saline solution and then 25 mL of preparation was aliquoted into 1.5-mL Eppendorf vials, each of which was wrapped with aluminum foil by the other specialist(Erkut Küçük) for protection against ultraviolet light (to prevent vitamin A degradation), and blinding the patients to the treatment. PFAT eye drops were also placed into different 1.5-ml Eppendorf vials and likewise wrapped with aluminum foil by the other specialist(Erkut Küçük) for blinding the patients. The droppers were also wrapped with aluminum foil for further blinding the patient while applying the eye drops. Patients were randomised via assigned laterality numbers and sealed regime envelopes by the other specialist(Erkut Küçük). Preservative-free isotonic saline was used for washout for 2 weeks prior to beginning of the study.
After the first treatment period (1 month) all patients underwent a 2-week washout period with isotonic saline (0.9 % NaCl) eye drops. Ten a new set of vials (AS or PFAT) was assigned to each patient by the other specialist(Erkut Küçük) for the second treatment period.
After the first 1-month treatment period, patients who had conventional PFAT treatment were switched to AS treatment and the patients who had AS treatment in the first 1-month treatment period were switched to conventional PFAT treat- ment in the second 1-month treatment period, according to the study's crossover nature. The examining ophthalmologist (Uğur Yılmaz) that performed tear function and ocular surface evaluations was blinded to the type of eye drops given to each patient. In addition, the patients were blinded to which treatment they were receiving.
Only the Other specialist (Erkut Küçük), who was not responsible for patient evaluation, knew which patient received which treatment during study periods. All patients were instructed to keep the vials (containing either AS or PFAT) in a refrigerator at 4 °C. All patients were advised to change the vial every other day during the treatment period. TBUT and ST I were administered by the same ophthalmologist (Uğur Yılmaz).
The study was approved Institutional Review Board of Erciyes University, Medicine School. The study was conducted in accordance to Helsinki Declaration. All patients gave written informed consent.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| preservative free artificial tear drop | Experimental | Drug: Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop)preservative free artificial tears drop is a drop group declaring different kind of active agent like hydroxypropyl methylcellulose, carboxymethyl cellulose etc commonly used in dry eye treatment. Preservative free artificial tear( carboxymethyl cellulose, hydroxypropyl methylcellulose) was used as four times one drop daily. In our study, we prescribed to patients preservative free artificial tears drop(hydroxypropyl methylcellulose or carboxymethyl cellulose) four times one drop daily. |
| %40 Autologous serum(AS) | Experimental | Drug: %40 diluted Autologous serumperipheral venous blood (14-20 ml) that drawn from antecubital vein of patients to prepare Autologous Serum. Blood sample was left at room temperature over 2 hours for clotting. Serum was obtained after centrifugation at 4000 revolutions per minute (rpm) for 10 minutes at 4 °C using a Nuve NF1200R. Next, in a laminar flow cabinet under sterile conditions, approximately 10 mL of supernatant was collected and diluted to 40 % with isotonic saline solution. It is recommended for dry eye diseases, too. %40 diluted Autologous Serum used as four times one drop daily. |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- isotretinoin use for any reason
Key exclusion criteria (9 listed)
- corneal pathologies such as dry eye illness before isotretinoin treatment
- previous cornea surgery, injury or keratitis
- active ocular infection
- meibomian gland dysfunction
- excessive allergic reaction that may be associated with dry eye
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| %40 diluted Autologous serumSerum that obtained after centrifugation of blood sample | Drug | %40 Autologous serum(AS) |
| Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop)Also: Tears naturale free(hydroxypropyl methylcellulose), Refresh single dose(polyvinyl Alcohol + Povidone)Preservative free artificial tears is a group naming for drops commonly used for drye disease | Drug | preservative free artificial tear drop |
Primary outcome
Change in Schirmer Test I in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment
Time frame: up to 3 Months monthly measurements were done
Schirmer Test I is used for Dry Eye evaluation before and after autologous serum or preservative free artificial tears treatment. Schirmer test is used to measure tear secretion. Schirmer strips are used for this test. Wetting of the paper is recorded in millimeter
Change in Break up Time in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment
Time frame: up to 3 Months monthly measurements were done
fluorescein sodium eye drops was used for measurement of Break up Time. Value of Break up Time for per eye is recorded as seconds
Change in Ocular surface Disease Index in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment
Time frame: up to 3 Months monthly measurements were done
OSDI score is a reliable and feasible test which is commonly used for dry eye patients to grade either dry eye symptom severity and its effect on vision-related function. In this index, people are asked to indicate whether they experienced any of the symptoms or problems due to drye eye, if so, how often. Every question asked to patients is scored from one to four according to the frequency of symptoms. The scores were collected from all the questions.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 Apr 2016.
- BackgroundOner AF, Ferahbas A, Karakucuk S, Utas S, Karaman B, Kutlugun C et al. Ocular side effects associated with systemic isotretinoin. Cutan Ocul Toxicol. 2005;23:189-195.
- Background: PubMed 7719068Egger SF, Huber-Spitzy V, Bohler K, Scholda C. [Isotretinoin administration in treatment of acne vulgaris. A prospective study of the kind and extent of ocular complications]. Ophthalmologe. 1995 Feb;92(1):17-20. German.
- Background: PubMed 11685055Tananuvat N, Daniell M, Sullivan LJ, Yi Q, McKelvie P, McCarty DJ, Taylor HR. Controlled study of the use of autologous serum in dry eye patients. Cornea. 2001 Nov;20(8):802-6. doi: 10.1097/00003226-200111000-00005.
- Background: PubMed 15733983Kojima T, Ishida R, Dogru M, Goto E, Matsumoto Y, Kaido M, Tsubota K. The effect of autologous serum eyedrops in the treatment of severe dry eye disease: a prospective randomized case-control study. Am J Ophthalmol. 2005 Feb;139(2):242-6. doi: 10.1016/j.ajo.2004.08.040.
- Background: PubMed 22670856Urzua CA, Vasquez DH, Huidobro A, Hernandez H, Alfaro J. Randomized double-blind clinical trial of autologous serum versus artificial tears in dry eye syndrome. Curr Eye Res. 2012 Aug;37(8):684-8. doi: 10.3109/02713683.2012.674609. Epub 2012 Jun 6.
- Individual participant dataSharing planned: Undecided
Related trials for Dry Eye
Not yet recruitingPhase 1
R-2487 in Patients With Sjogren's Syndrome (SjD)
Sjogren's Syndrome, Sjögren
RecruitingPhase 1
A Trial in Healthy Adult Participants and Adults With Autoimmune Diseases to Test How HBM7020 is Tolerated and How it Behaves in the Body
Rheumatoid Arthritis, Systemic Lupus Erythematosus
RecruitingObservational study
Pain Phenotyping of Rheumatic Diseases - An Observational Study
Rheumatic Diseases, Lupus Erythematosus, Systemic
RecruitingPhase 1/2
Autologous Transplantation of Induced Pluripotent Stem Cell-Derived Retinal Pigment Epithelium for Geographic Atrophy Associated With Age-Related Macular Degeneration
Dry Age-Related Macular Degeneration, Geographic Atrophy
RecruitingObservational study
The Pathogenesis and Natural History of Sjogren's Disease
Sjogren's Syndrome, Salivary Gland
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Uğur Yılmaz, M.D. study chair
Niğde State Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing %40 diluted Autologous serum and Preservative free artificial tears(Tears naturale free, Refresh single dose eye drop) in people with Dry Eye, run by Niğde State Hospital at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 27 Apr 2016. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Schirmer Test I in Patients with Dry Eye due to isotretinoin use after autologous serum or preservative free artificial tears treatment (time frame: up to 3 Months monthly measurements were done). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02752763, which also lists 5 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Apr 2016.