Pseudoexfoliation SyndromeNCT01298895
Optical Low Coherence Reflectometry Enables Preoperative Detection of Zonular Weakness in Pseudoexfoliation Syndrome
An observational study of Pseudoexfoliation Syndrome, run by General Hospital Sveti Duh at 1 site in Croatia.
Trial summary
The purpose of the study was to evaluate optical ocular components in patients with pseudoexfoliation syndrome using optical low coherence reflectometry. A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted from January 2009 until July 2009. Read more about this study
- Who is it for?
- Ages 40 years and older
- Conditions the study is for
- Pseudoexfoliation Syndrome
- How many people
- 224 participants
- Where
- 1 siteCroatia
- Study dates
- Jan 2009to Jul 2009
- Phase
- Observational
- 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 40 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted at the University Eye Clinic, General hospital Sveti Duh, Zagreb, Croatia. The inclusion criteria was age of patients over 40 years. Sex and refractive eye state were randomly chosen out of all cataract patients operated at the Clinic from January 2009 until July 2009.
Who may be able to join
- age of patients over 40 years old
- must have cataract
- for the PEX group must have cataract complicated with PEX
Who cannot join
- age below 40 years old
- absence of cataract
- presence of other ocular pathology in the control group
Trial locations and contacts
1 site in 1 country.
About this study
The purpose of the study was to evaluate optical ocular components in patients with pseudoexfoliation syndrome using optical low coherence reflectometry. A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted from January 2009 until July 2009. Patients were divided in two groups: the first group of 47 eyes with cataract complicated with pseudoexfoliation syndrome and the control group of 177 eyes with uncomplicated cataract. Each group was further divided into two subgroups based on its refractive state: emmetropes and hypermetropes. The optical low coherence reflectometry biometer LENSTAR® LS 900® was used to define ocular optical components.
Read the detailed description
Material and methods A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted at the University Eye Clinic, General Hospital Sveti Duh, Zagreb, Croatia. The inclusion criteria was age of patients over 40 years. Sex and refractive eye state were randomly chosen out of all cataract patients operated at the Clinic from January 2009 until July 2009. Patients were divided in two groups. The first group consisted of 47 eyes with cataract complicated with PEX. The control group included 177 eyes with uncomplicated cataract in eyes without other ocular pathology. Refractive state was defined by preoperatively calculated emmetropisation intraocular lens (IOL) value done by LENSTAR LS 900®. Emmetropes had IOL value of 20-22 diopters and hypermetropes of more than 22 diopters. There were no myopic patients defined as IOL value less than 20 diopters in the PEX group operated at the Clinic in the defined time. Consequently, there were no myopic patients included in the control group. The PEX group and the control group were further divided into two subgroups: emmetropes and hypermetropes. LENSTAR LS 900® was used to measure ocular optical components 3-9: axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), retinal thickness (RT), keratometry values (keratometry of the steepest meridian (K1), keratometry of the flattest meridian (K2), its position regarding horizontal line (AXIS) and the difference between K1 and K2 (astigmatism, AST), horizontal diameter of iris (WTW) and pupillary diameter (PD). Ethics committee approval of General Hospital Sveti Duh, Zagreb, Croatia, was secured for the study reported. All study procedures adhered to the recommendations of the Declaration of Helsinki. Written consent was obtained from all patients prior to their inclusion in the study. Sample size was defined in a way to provide sufficient statistical power of the study, which was in this case over 90%. Descriptive statistics and Student's t-test were used for data evaluation. Value of p<0.05 was considered significant.
- Conditions
- Pseudoexfoliation Syndrome
- Keywords
- optical components, pseudoexfoliation, cataract, LENSTAR® LS 900®
- Medical subject headings
- Exfoliation Syndrome, Cataract
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| PEX group | The first group consisted of 47 eyes with cataract complicated with pseudoexfoliation syndrome (PEX). | |
| control group | The control group included 177 eyes with uncomplicated cataract in eyes without other ocular pathology |
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Feb 2011 (estimated)
- Study startJan 2009
- Primary completionJul 2009
- Study completionJul 2009
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (31)Papers the sponsor has linked to this study.
- Other trials for Pseudoexfoliation SyndromeStudies 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
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 224 participants (actual)
Sponsor and investigators
- Lead sponsor
- General Hospital Sveti Duh
- Sponsor type
- University, hospital or other
- Investigators
- Mladen Bušić, Assoc.Prof., Study director, University Eye Clinic, General hospital Sveti Duh, Zagreb, Croatia
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01298895
- Sponsor's protocol ID
- 0192/09.01.2009.
- Status last verified
- Jan 2009
- First submitted
- 17 Feb 2011
- Last updated
- 18 Feb 2011
- Results posted
- No
- Data monitoring committee
- No
Publications
Busic M, Kastelan S. Pseudoexfoliation syndrome and cataract surgery by phacoemulsification. Coll Antropol. 2005;29 Suppl 1:163-6.
PubMed 16193703Scorolli L, Scorolli L, Campos EC, Bassein L, Meduri RA. Pseudoexfoliation syndrome: a cohort study on intraoperative complications in cataract surgery. Ophthalmologica. 1998;212(4):278-80. doi: 10.1159/000027307.
PubMed 9672219Buckhurst PJ, Wolffsohn JS, Shah S, Naroo SA, Davies LN, Berrow EJ. A new optical low coherence reflectometry device for ocular biometry in cataract patients. Br J Ophthalmol. 2009 Jul;93(7):949-53. doi: 10.1136/bjo.2008.156554. Epub 2009 Apr 19.
PubMed 19380310Cruysberg LP, Doors M, Verbakel F, Berendschot TT, De Brabander J, Nuijts RM. Evaluation of the Lenstar LS 900 non-contact biometer. Br J Ophthalmol. 2010 Jan;94(1):106-10. doi: 10.1136/bjo.2009.161729. Epub 2009 Aug 18.
PubMed 19692383Rohrer K, Frueh BE, Walti R, Clemetson IA, Tappeiner C, Goldblum D. Comparison and evaluation of ocular biometry using a new noncontact optical low-coherence reflectometer. Ophthalmology. 2009 Nov;116(11):2087-92. doi: 10.1016/j.ophtha.2009.04.019. Epub 2009 Sep 10.
PubMed 19744720Hoffer KJ, Shammas HJ, Savini G. Comparison of 2 laser instruments for measuring axial length. J Cataract Refract Surg. 2010 Apr;36(4):644-8. doi: 10.1016/j.jcrs.2009.11.007.
PubMed 20362858Liampa Z, Kynigopoulos M, Pallas G, Gerding H. Comparison of two partial coherence interferometry devices for ocular biometry. Klin Monbl Augenheilkd. 2010 Apr;227(4):285-8. doi: 10.1055/s-0029-1245182. Epub 2010 Apr 20.
PubMed 20408075Bjelos Roncevic M, Busic M, Cima I, Kuzmanovic Elabjer B, Bosnar D, Miletic D. Comparison of optical low-coherence reflectometry and applanation ultrasound biometry on intraocular lens power calculation. Graefes Arch Clin Exp Ophthalmol. 2011 Jan;249(1):69-75. doi: 10.1007/s00417-010-1509-4. Epub 2010 Sep 18.
PubMed 20853004Bjelos Roncevic M, Busic M, Cima I, Kuzmanovic Elabjer B, Bosnar D, Miletic D. Intraobserver and interobserver repeatability of ocular components measurement in cataract eyes using a new optical low coherence reflectometer. Graefes Arch Clin Exp Ophthalmol. 2011 Jan;249(1):83-7. doi: 10.1007/s00417-010-1546-z. Epub 2010 Oct 28.
PubMed 20981435Karger RA, Jeng SM, Johnson DH, Hodge DO, Good MS. Estimated incidence of pseudoexfoliation syndrome and pseudoexfoliation glaucoma in Olmsted County, Minnesota. J Glaucoma. 2003 Jun;12(3):193-7. doi: 10.1097/00061198-200306000-00002.
PubMed 12782834Klein BE, Klein R, Lee KE. Incidence of age-related cataract over a 10-year interval: the Beaver Dam Eye Study. Ophthalmology. 2002 Nov;109(11):2052-7. doi: 10.1016/s0161-6420(02)01249-6.
PubMed 12414414Mccarty CA, Taylor HR. Pseudoexfoliation syndrome in Australian adults. Am J Ophthalmol. 2000 May;129(5):629-33. doi: 10.1016/s0002-9394(99)00466-3.
PubMed 10844055Bayramlar H, Ozden S, Ergin M, Tutarli H. Ultrasonografic measurement of ocular refractive components in eyes with various refractive states. T Klin Oftalmoloji 3:90-94, 1994.
Bartholomew RS. Anterior chamber depth in eyes with pseudoexfoliation. Br J Ophthalmol. 1980 May;64(5):322-3. doi: 10.1136/bjo.64.5.322.
PubMed 7437392Kuchle M, Viestenz A, Martus P, Handel A, Junemann A, Naumann GO. Anterior chamber depth and complications during cataract surgery in eyes with pseudoexfoliation syndrome. Am J Ophthalmol. 2000 Mar;129(3):281-5. doi: 10.1016/s0002-9394(99)00365-7.
PubMed 10704540
Study at a glance
From the registry record, last updated by the sponsor on 18 Feb 2011. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Optical Low Coherence Reflectometry Enables Preoperative Detection of Zonular Weakness in Pseudoexfoliation Syndrome
- ClinicalTrials.gov ID
- NCT01298895
- Acronym / sponsor ID
- 0192/09.01.2009.
- Conditions
- Pseudoexfoliation Syndrome
- Keywords
- optical components, pseudoexfoliation, cataract, LENSTAR® LS 900®
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 224 participants (actual)
- Lead sponsor
- General Hospital Sveti DuhUniversity, hospital or other
- Study start
- Jan 2009
- Primary completion
- Jul 2009 (actual)
- Study completion
- Jul 2009 (actual)
- First posted
- 18 Feb 2011 (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.
The purpose of the study was to evaluate optical ocular components in patients with pseudoexfoliation syndrome using optical low coherence reflectometry. A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted from January 2009 until July 2009. Patients were divided in two groups: the first group of 47 eyes with cataract complicated with pseudoexfoliation syndrome and the control group of 177 eyes with uncomplicated cataract. Each group was further divided into two subgroups based on its refractive state: emmetropes and hypermetropes. The optical low coherence reflectometry biometer LENSTAR® LS 900® was used to define ocular optical components.
Detailed description
Material and methods A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted at the University Eye Clinic, General Hospital Sveti Duh, Zagreb, Croatia. The inclusion criteria was age of patients over 40 years. Sex and refractive eye state were randomly chosen out of all cataract patients operated at the Clinic from January 2009 until July 2009. Patients were divided in two groups. The first group consisted of 47 eyes with cataract complicated with PEX. The control group included 177 eyes with uncomplicated cataract in eyes without other ocular pathology. Refractive state was defined by preoperatively calculated emmetropisation intraocular lens (IOL) value done by LENSTAR LS 900®. Emmetropes had IOL value of 20-22 diopters and hypermetropes of more than 22 diopters. There were no myopic patients defined as IOL value less than 20 diopters in the PEX group operated at the Clinic in the defined time. Consequently, there were no myopic patients included in the control group. The PEX group and the control group were further divided into two subgroups: emmetropes and hypermetropes. LENSTAR LS 900® was used to measure ocular optical components 3-9: axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), retinal thickness (RT), keratometry values (keratometry of the steepest meridian (K1), keratometry of the flattest meridian (K2), its position regarding horizontal line (AXIS) and the difference between K1 and K2 (astigmatism, AST), horizontal diameter of iris (WTW) and pupillary diameter (PD). Ethics committee approval of General Hospital Sveti Duh, Zagreb, Croatia, was secured for the study reported. All study procedures adhered to the recommendations of the Declaration of Helsinki. Written consent was obtained from all patients prior to their inclusion in the study. Sample size was defined in a way to provide sufficient statistical power of the study, which was in this case over 90%. Descriptive statistics and Student's t-test were used for data evaluation. Value of p<0.05 was considered significant.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| PEX group | – | –The first group consisted of 47 eyes with cataract complicated with pseudoexfoliation syndrome (PEX). |
| control group | – | –The control group included 177 eyes with uncomplicated cataract in eyes without other ocular pathology |
Who may qualify
- Ages
- 40 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- A prospective cohort study of 224 eyes of patients planned for cataract surgery was conducted at the University Eye Clinic, General hospital Sveti Duh, Zagreb, Croatia. The inclusion criteria was age of patients over 40 years. Sex and refractive eye state were randomly chosen out of all cataract patients operated at the Clinic from January 2009 until July 2009.
Key inclusion criteria (3 listed)
- age of patients over 40 years old
- must have cataract
- for the PEX group must have cataract complicated with PEX
Key exclusion criteria (3 listed)
- age below 40 years old
- absence of cataract
- presence of other ocular pathology in the control group
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
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 18 Feb 2011.
- Background: PubMed 16193703Busic M, Kastelan S. Pseudoexfoliation syndrome and cataract surgery by phacoemulsification. Coll Antropol. 2005;29 Suppl 1:163-6.
- Background: PubMed 9672219Scorolli L, Scorolli L, Campos EC, Bassein L, Meduri RA. Pseudoexfoliation syndrome: a cohort study on intraoperative complications in cataract surgery. Ophthalmologica. 1998;212(4):278-80. doi: 10.1159/000027307.
- Background: PubMed 19380310Buckhurst PJ, Wolffsohn JS, Shah S, Naroo SA, Davies LN, Berrow EJ. A new optical low coherence reflectometry device for ocular biometry in cataract patients. Br J Ophthalmol. 2009 Jul;93(7):949-53. doi: 10.1136/bjo.2008.156554. Epub 2009 Apr 19.
- Background: PubMed 19692383Cruysberg LP, Doors M, Verbakel F, Berendschot TT, De Brabander J, Nuijts RM. Evaluation of the Lenstar LS 900 non-contact biometer. Br J Ophthalmol. 2010 Jan;94(1):106-10. doi: 10.1136/bjo.2009.161729. Epub 2009 Aug 18.
- Background: PubMed 19744720Rohrer K, Frueh BE, Walti R, Clemetson IA, Tappeiner C, Goldblum D. Comparison and evaluation of ocular biometry using a new noncontact optical low-coherence reflectometer. Ophthalmology. 2009 Nov;116(11):2087-92. doi: 10.1016/j.ophtha.2009.04.019. Epub 2009 Sep 10.
- Background: PubMed 20362858Hoffer KJ, Shammas HJ, Savini G. Comparison of 2 laser instruments for measuring axial length. J Cataract Refract Surg. 2010 Apr;36(4):644-8. doi: 10.1016/j.jcrs.2009.11.007.
- Background: PubMed 20408075Liampa Z, Kynigopoulos M, Pallas G, Gerding H. Comparison of two partial coherence interferometry devices for ocular biometry. Klin Monbl Augenheilkd. 2010 Apr;227(4):285-8. doi: 10.1055/s-0029-1245182. Epub 2010 Apr 20.
- Background: PubMed 20853004Bjelos Roncevic M, Busic M, Cima I, Kuzmanovic Elabjer B, Bosnar D, Miletic D. Comparison of optical low-coherence reflectometry and applanation ultrasound biometry on intraocular lens power calculation. Graefes Arch Clin Exp Ophthalmol. 2011 Jan;249(1):69-75. doi: 10.1007/s00417-010-1509-4. Epub 2010 Sep 18.
- Background: PubMed 20981435Bjelos Roncevic M, Busic M, Cima I, Kuzmanovic Elabjer B, Bosnar D, Miletic D. Intraobserver and interobserver repeatability of ocular components measurement in cataract eyes using a new optical low coherence reflectometer. Graefes Arch Clin Exp Ophthalmol. 2011 Jan;249(1):83-7. doi: 10.1007/s00417-010-1546-z. Epub 2010 Oct 28.
- Background: PubMed 12782834Karger RA, Jeng SM, Johnson DH, Hodge DO, Good MS. Estimated incidence of pseudoexfoliation syndrome and pseudoexfoliation glaucoma in Olmsted County, Minnesota. J Glaucoma. 2003 Jun;12(3):193-7. doi: 10.1097/00061198-200306000-00002.
- Background: PubMed 12414414Klein BE, Klein R, Lee KE. Incidence of age-related cataract over a 10-year interval: the Beaver Dam Eye Study. Ophthalmology. 2002 Nov;109(11):2052-7. doi: 10.1016/s0161-6420(02)01249-6.
- Background: PubMed 10844055Mccarty CA, Taylor HR. Pseudoexfoliation syndrome in Australian adults. Am J Ophthalmol. 2000 May;129(5):629-33. doi: 10.1016/s0002-9394(99)00466-3.
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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.
Mladen Bušić, Assoc.Prof. study director
University Eye Clinic, General hospital Sveti Duh, Zagreb, Croatia
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Pseudoexfoliation Syndrome, run by General Hospital Sveti Duh at 1 site in Croatia.
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 3 inclusion and 3 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 18 Feb 2011. 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 Croatia. 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.
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.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01298895, which also lists 31 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 18 Feb 2011.