Ignite Creation Date:
2024-10-26 @ 3:35 PM
Last Modification Date:
2024-10-26 @ 3:35 PM
Study NCT ID:
NCT06505096
Status:
NOT_YET_RECRUITING
Last Update Posted:
None
First Post:
2024-07-11
Brief Title:
A Comparative Study of the Results of Dynamic and OPD Static Measurement of Pupil Diameter Before and After Cataract Surgery by Pupil Detectors
Sponsor:
None
Organization:
None
Study Overview
Official Title:
A Comparative Study of the Results of Dynamic and OPD Static Measurement of Pupil Diameter Before and After Cataract Surgery by Pupil Detectors
Status:
NOT_YET_RECRUITING
Status Verified Date:
2024-07
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
No
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Age-related cataract remains the leading cause of blindness in developing countries And with the aging of the population in these countries the number of cataract patients will continue to grow With accurate biological measurements and the implantation of a suitable IOL most cataract patients can achieve good distance vision after surgery Studies have shown differences in pupil diameter and sensitivity in patients with different refractive states with correlations to accommodation status as well as refractive error The pupil is an important factor to be evaluated during the selection of an artificial lens Intraocular lens IOL especially a functional IOL
Among the various instruments used for preoperative cataract biological measurements the light source is mostly a fixed parameter and the static pupil diameter measurement by fixed illumination light source detection as an evaluation method is relatively rough In this study we are going to simulate different illumination states in daily life and set up two kinds of measurement instruments namely OPD and binocular pupil detector so as to obtain more realistic research results and to explore the following 1 The static and dynamic measurement of pupil diameter by people of different refractive states in different periods of preoperative and postoperative period 2 Whether there is a difference between the static and dynamic pupil measurement results 2 the change of pupil size under the stimulation of different light sources and to compare the difference between the two detection methods to provide objective pupil indexes for the more scientific selection of functional IOLs to provide a basis for the selection of more accurate pupil measurement methods to accurately screen the population of the use of functional IOLs and to improve the patients satisfaction after the operation
Purpose of the study To simulate the difference between the preoperative and postoperative pupil diameters of cataract patients measured by static and dynamic methods under daily illumination to select a more accurate pupil measurement method and to make corrections for the evaluation of preoperative biometric indexes
Among the various instruments used for preoperative cataract biological measurements the light source is mostly a fixed parameter and the static pupil diameter measurement by fixed illumination light source detection as an evaluation method is relatively rough In this study we are going to simulate different illumination states in daily life and set up two kinds of measurement instruments namely OPD and binocular pupil detector so as to obtain more realistic research results and to explore the following 1 The static and dynamic measurement of pupil diameter by people of different refractive states in different periods of preoperative and postoperative period 2 Whether there is a difference between the static and dynamic pupil measurement results 2 the change of pupil size under the stimulation of different light sources and to compare the difference between the two detection methods to provide objective pupil indexes for the more scientific selection of functional IOLs to provide a basis for the selection of more accurate pupil measurement methods to accurately screen the population of the use of functional IOLs and to improve the patients satisfaction after the operation
Purpose of the study To simulate the difference between the preoperative and postoperative pupil diameters of cataract patients measured by static and dynamic methods under daily illumination to select a more accurate pupil measurement method and to make corrections for the evaluation of preoperative biometric indexes
Detailed Description:
None
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None