Measurement of Pupil DiameterNCT05717244
Comparison of Two Different Pupillometer
An observational study of Measurement of Pupil Diameter, run by He Eye Hospital at 1 site in China.
Trial summary
With the development of refractive surgery, the size of scotopic pupil has been widely concerned by clinicians. Historically, the measurement of pupil size included the use of a pupil ruler, which is known for its drawback of being very subjective and lacking precision. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Measurement of Pupil Diameter
- What is being tested?
- 2WIN-S and OPD
- Type of treatment
- Medical device
- How many people
- 100 participants
- Where
- 1 siteChina
- Study dates
- 1 Sep 2023to 1 Feb 2024
- 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 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: adults attending ophthalmology clinic
Who may be able to join
- >18 years old
- signed informed consent
- willing to participate in the study
Who cannot join
- Exclusion criteria were ocular pathology known to interfere with pupillometer outcome and pupil abnormalities (eg: glaucoma, iritis, cataract, corneal scarring, any history of ocular surgery, and history of trauma.)
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Comparison of Two Pupillometer for Determining Pupil Diameter in Healthy Participants
With the development of refractive surgery, the size of scotopic pupil has been widely concerned by clinicians. Historically, the measurement of pupil size included the use of a pupil ruler, which is known for its drawback of being very subjective and lacking precision. While infrared pupillometry devices such as OPD-Scan III and Sirius are available for accurately and reliably measuring pupil size. Nevertheless, the aforementioned equipments are costly and cumbersome to move in terms of screening and field trial logistics settings. And 2WIN-S is a portable refractor, it can in a short period of diopter and scotopic pupil size and other data obtained at the same time. Therefore, the aim of this study was to compare the agreement between 2WIN-S and OPD-Scan III in measuring scotopic pupil size and the repeatability of 2WIN-S.
Read the detailed description
Pupil diameter is a parameter of great interest in understanding brain systems and modern refractive surgery. Pupillometry, the measurement of variations in pupil dilation, has offered encouraging evidence for the involvement of disturbed reactivity in depression risk, according to studies. According to research, the pupil dilates in reaction to stimuli requiring a larger cognitive load or a greater emotional intensity. Importantly, studies have related pupil size variations to brain activity in regions associated with emotion regulation, including the dorsolateral prefrontal cortex (DPFC) and the agenesis of the corpus callosum (ACC) . Thus, pupillometry is proposed as a viable peripheral gauge for a variety of brain systems involved in the processing of emotional information.
Some of the postoperative complaints of patients having refractive corneal or lens surgery are related to visual quality and are associated with large pupils since optical aberrations become more dominant when the pupil dilates . If the pupil size exceeds the optical zone size, a marked increase in higher-order aberrations could be observed. Patients might complain about poor contrast sensitivity, increased glare disability, or halos. Precise measurement of scotopic pupil diameter has therefore become an essential step in the preoperative evaluation of patients suitable for refractive surgery and is an important inclusion or exclusion criterion.
This study aimed to assess the agreement and reproducibility of scotopic pupil size measurements using 2WIN-S compared with OPD-Scan III in Chinese adults.
- Conditions
- Measurement of Pupil Diameter
- Being tested
- 2WIN-S, OPD
- Keywords
- 2WIN-S, scotopic pupil size
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
2WIN-SDevice
Determining pupil diameter by 2WIN-S
OPDDevice
Determining pupil diameter by OPD
What is being measured
The primary outcome is the main question the study is designed to answer.
Scotopic pupil size
Scotopic pupil size will be measured using 2WIN-S with OPD-Scan III.
Measured: 1 day
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Feb 2023
- Study start1 Sep 2023
- Primary completion20 Dec 2023
- Study completion1 Feb 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Measurement of Pupil DiameterStudies 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
- 100 participants (actual)
Sponsor and investigators
- Lead sponsor
- He Eye Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Emmanuel E Pazo, MD, PhD, Study chair, He Eye Hospital, Shenyang, China
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05717244
- Sponsor's protocol ID
- 2WIN2023
- Status last verified
- Feb 2023
- First submitted
- 29 Jan 2023
- Last updated
- 24 Jun 2024
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Jones NP, Siegle GJ, Mandell D. Motivational and emotional influences on cognitive control in depression: A pupillometry study. Cogn Affect Behav Neurosci. 2015 Jun;15(2):263-75. doi: 10.3758/s13415-014-0323-6.
PubMed 25280561Siegle GJ, Steinhauer SR, Friedman ES, Thompson WS, Thase ME. Remission prognosis for cognitive therapy for recurrent depression using the pupil: utility and neural correlates. Biol Psychiatry. 2011 Apr 15;69(8):726-33. doi: 10.1016/j.biopsych.2010.12.041.
PubMed 21447417Siegle GJ, Granholm E, Ingram RE, Matt GE. Pupillary and reaction time measures of sustained processing of negative information in depression. Biol Psychiatry. 2001 Apr 1;49(7):624-36. doi: 10.1016/s0006-3223(00)01024-6.
PubMed 11297720Siegle GJ, Steinhauer SR, Stenger VA, Konecky R, Carter CS. Use of concurrent pupil dilation assessment to inform interpretation and analysis of fMRI data. Neuroimage. 2003 Sep;20(1):114-24. doi: 10.1016/s1053-8119(03)00298-2.
PubMed 14527574Critchley HD, Tang J, Glaser D, Butterworth B, Dolan RJ. Anterior cingulate activity during error and autonomic response. Neuroimage. 2005 Oct 1;27(4):885-95. doi: 10.1016/j.neuroimage.2005.05.047.
PubMed 15996878Urry HL, van Reekum CM, Johnstone T, Kalin NH, Thurow ME, Schaefer HS, Jackson CA, Frye CJ, Greischar LL, Alexander AL, Davidson RJ. Amygdala and ventromedial prefrontal cortex are inversely coupled during regulation of negative affect and predict the diurnal pattern of cortisol secretion among older adults. J Neurosci. 2006 Apr 19;26(16):4415-25. doi: 10.1523/JNEUROSCI.3215-05.2006.
PubMed 16624961Fardell J. Poverty and infant deaths. Nurs Times. 1989 Jan 11-17;85(2):18. No abstract available.
PubMed 2922323Martinez CE, Applegate RA, Klyce SD, McDonald MB, Medina JP, Howland HC. Effect of pupillary dilation on corneal optical aberrations after photorefractive keratectomy. Arch Ophthalmol. 1998 Aug;116(8):1053-62. doi: 10.1001/archopht.116.8.1053.
PubMed 9715686Rosen ES, Gore CL, Taylor D, Chitkara D, Howes F, Kowalewski E. Use of a digital infrared pupillometer to assess patient suitability for refractive surgery. J Cataract Refract Surg. 2002 Aug;28(8):1433-8. doi: 10.1016/s0886-3350(01)01350-5.
PubMed 12160815Liu Q, Yang X, Lin L, Liu M, Lin H, Liu F, Xie Y, Lam DSC. Review on Centration, Astigmatic Axis Alignment, Pupil Size and Optical Zone in SMILE. Asia Pac J Ophthalmol (Phila). 2019 Sep-Oct;8(5):385-390. doi: 10.1097/01.APO.0000580144.22353.46.
PubMed 31567265Couret D, Boumaza D, Grisotto C, Triglia T, Pellegrini L, Ocquidant P, Bruder NJ, Velly LJ. Reliability of standard pupillometry practice in neurocritical care: an observational, double-blinded study. Crit Care. 2016 Mar 13;20:99. doi: 10.1186/s13054-016-1239-z.
PubMed 27072310Nyholm B, Obling L, Hassager C, Grand J, Moller J, Othman M, Kondziella D, Kjaergaard J. Superior reproducibility and repeatability in automated quantitative pupillometry compared to standard manual assessment, and quantitative pupillary response parameters present high reliability in critically ill cardiac patients. PLoS One. 2022 Jul 28;17(7):e0272303. doi: 10.1371/journal.pone.0272303. eCollection 2022.
PubMed 35901103
Study at a glance
From the registry record, last updated by the sponsor on 24 Jun 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Two Pupillometer for Determining Pupil Diameter in Healthy Participants
- ClinicalTrials.gov ID
- NCT05717244
- Acronym / sponsor ID
- 2WIN2023
- Conditions
- Measurement of Pupil Diameter
- Keywords
- 2WIN-S, scotopic pupil size
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 100 participants (actual)
- Lead sponsor
- He Eye HospitalUniversity, hospital or other
- Study start
- 1 Sep 2023 (actual)
- Primary completion
- 20 Dec 2023 (actual)
- Study completion
- 1 Feb 2024 (actual)
- First posted
- 8 Feb 2023 (actual)
- 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.
With the development of refractive surgery, the size of scotopic pupil has been widely concerned by clinicians. Historically, the measurement of pupil size included the use of a pupil ruler, which is known for its drawback of being very subjective and lacking precision. While infrared pupillometry devices such as OPD-Scan III and Sirius are available for accurately and reliably measuring pupil size. Nevertheless, the aforementioned equipments are costly and cumbersome to move in terms of screening and field trial logistics settings. And 2WIN-S is a portable refractor, it can in a short period of diopter and scotopic pupil size and other data obtained at the same time. Therefore, the aim of this study was to compare the agreement between 2WIN-S and OPD-Scan III in measuring scotopic pupil size and the repeatability of 2WIN-S.
Detailed description
Pupil diameter is a parameter of great interest in understanding brain systems and modern refractive surgery. Pupillometry, the measurement of variations in pupil dilation, has offered encouraging evidence for the involvement of disturbed reactivity in depression risk, according to studies. According to research, the pupil dilates in reaction to stimuli requiring a larger cognitive load or a greater emotional intensity. Importantly, studies have related pupil size variations to brain activity in regions associated with emotion regulation, including the dorsolateral prefrontal cortex (DPFC) and the agenesis of the corpus callosum (ACC) . Thus, pupillometry is proposed as a viable peripheral gauge for a variety of brain systems involved in the processing of emotional information.
Some of the postoperative complaints of patients having refractive corneal or lens surgery are related to visual quality and are associated with large pupils since optical aberrations become more dominant when the pupil dilates . If the pupil size exceeds the optical zone size, a marked increase in higher-order aberrations could be observed. Patients might complain about poor contrast sensitivity, increased glare disability, or halos. Precise measurement of scotopic pupil diameter has therefore become an essential step in the preoperative evaluation of patients suitable for refractive surgery and is an important inclusion or exclusion criterion.
This study aimed to assess the agreement and reproducibility of scotopic pupil size measurements using 2WIN-S compared with OPD-Scan III in Chinese adults.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- adults attending ophthalmology clinic
Key inclusion criteria (3 listed)
- >18 years old
- signed informed consent
- willing to participate in the study
Key exclusion criteria (1 listed)
- Exclusion criteria were ocular pathology known to interfere with pupillometer outcome and pupil abnormalities (eg: glaucoma, iritis, cataract, corneal scarring, any history of ocular surgery, and history of trauma.)
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 |
|---|---|---|
| 2WIN-SDetermining pupil diameter by 2WIN-S | Device | – |
| OPDDetermining pupil diameter by OPD | Device | – |
Primary outcome
Scotopic pupil size
Time frame: 1 day
Scotopic pupil size will be measured using 2WIN-S with OPD-Scan III.
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 24 Jun 2024.
- Background: PubMed 25280561Jones NP, Siegle GJ, Mandell D. Motivational and emotional influences on cognitive control in depression: A pupillometry study. Cogn Affect Behav Neurosci. 2015 Jun;15(2):263-75. doi: 10.3758/s13415-014-0323-6.
- Background: PubMed 21447417Siegle GJ, Steinhauer SR, Friedman ES, Thompson WS, Thase ME. Remission prognosis for cognitive therapy for recurrent depression using the pupil: utility and neural correlates. Biol Psychiatry. 2011 Apr 15;69(8):726-33. doi: 10.1016/j.biopsych.2010.12.041.
- Background: PubMed 11297720Siegle GJ, Granholm E, Ingram RE, Matt GE. Pupillary and reaction time measures of sustained processing of negative information in depression. Biol Psychiatry. 2001 Apr 1;49(7):624-36. doi: 10.1016/s0006-3223(00)01024-6.
- Background: PubMed 14527574Siegle GJ, Steinhauer SR, Stenger VA, Konecky R, Carter CS. Use of concurrent pupil dilation assessment to inform interpretation and analysis of fMRI data. Neuroimage. 2003 Sep;20(1):114-24. doi: 10.1016/s1053-8119(03)00298-2.
- Background: PubMed 15996878Critchley HD, Tang J, Glaser D, Butterworth B, Dolan RJ. Anterior cingulate activity during error and autonomic response. Neuroimage. 2005 Oct 1;27(4):885-95. doi: 10.1016/j.neuroimage.2005.05.047.
- Background: PubMed 16624961Urry HL, van Reekum CM, Johnstone T, Kalin NH, Thurow ME, Schaefer HS, Jackson CA, Frye CJ, Greischar LL, Alexander AL, Davidson RJ. Amygdala and ventromedial prefrontal cortex are inversely coupled during regulation of negative affect and predict the diurnal pattern of cortisol secretion among older adults. J Neurosci. 2006 Apr 19;26(16):4415-25. doi: 10.1523/JNEUROSCI.3215-05.2006.
- Background: PubMed 2922323Fardell J. Poverty and infant deaths. Nurs Times. 1989 Jan 11-17;85(2):18. No abstract available.
- Background: PubMed 9715686Martinez CE, Applegate RA, Klyce SD, McDonald MB, Medina JP, Howland HC. Effect of pupillary dilation on corneal optical aberrations after photorefractive keratectomy. Arch Ophthalmol. 1998 Aug;116(8):1053-62. doi: 10.1001/archopht.116.8.1053.
- Background: PubMed 12160815Rosen ES, Gore CL, Taylor D, Chitkara D, Howes F, Kowalewski E. Use of a digital infrared pupillometer to assess patient suitability for refractive surgery. J Cataract Refract Surg. 2002 Aug;28(8):1433-8. doi: 10.1016/s0886-3350(01)01350-5.
- Background: PubMed 31567265Liu Q, Yang X, Lin L, Liu M, Lin H, Liu F, Xie Y, Lam DSC. Review on Centration, Astigmatic Axis Alignment, Pupil Size and Optical Zone in SMILE. Asia Pac J Ophthalmol (Phila). 2019 Sep-Oct;8(5):385-390. doi: 10.1097/01.APO.0000580144.22353.46.
- Background: PubMed 27072310Couret D, Boumaza D, Grisotto C, Triglia T, Pellegrini L, Ocquidant P, Bruder NJ, Velly LJ. Reliability of standard pupillometry practice in neurocritical care: an observational, double-blinded study. Crit Care. 2016 Mar 13;20:99. doi: 10.1186/s13054-016-1239-z.
- Background: PubMed 35901103Nyholm B, Obling L, Hassager C, Grand J, Moller J, Othman M, Kondziella D, Kjaergaard J. Superior reproducibility and repeatability in automated quantitative pupillometry compared to standard manual assessment, and quantitative pupillary response parameters present high reliability in critically ill cardiac patients. PLoS One. 2022 Jul 28;17(7):e0272303. doi: 10.1371/journal.pone.0272303. eCollection 2022.
- Individual participant dataSharing planned: Undecided
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.
Emmanuel E Pazo, MD, PhD study chair
He Eye Hospital, Shenyang, China
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 Measurement of Pupil Diameter, run by He Eye Hospital at 1 site in China.
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 1 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 24 Jun 2024. 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 China. 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.
What does the primary outcome measure?
Scotopic pupil size (time frame: 1 day). 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 NCT05717244, which also lists 12 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 24 Jun 2024.