Matching Glaucoma With Impaired Cognition

Study Overview
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Brief Summary
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Glaucoma is the leading cause of irreversible blindness in the world. The current study is designed to find the underlying relationship between impairment of topological perception and incidence of glaucoma.

Detailed Description
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Glaucoma is currently the leading cause of irreversible blindness in the world. It has been a difficult task for ophthalmologists and researchers to diagnose glaucoma, especially in early stage. At present, glaucoma diagnosis mainly relies on OCT and visual field test, which have relatively low sensitivity and specificity at the early stage of glaucoma. Previous studies mainly focused on ocular manifestation of glaucoma. However, there was evidence that abnormalities of visual pathway also existed in patients with glaucoma, indicating cerebral cognitive defects may also be involved in glaucoma development. Thus, the current study was designed, in which subjects at high-risk of developing glaucoma are separated into two group based on test results of topological perception. After five years' follow-up, morbidity of primary open-angle glaucoma would be compared between groups to see if there was any relationship between impaired cognitive function and incidence of glaucoma.

Official Title
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Association of Glaucoma Morbidity and Impairment of Topological Perception: a Cohort Study

Conditions
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Morbidity of Primary Open Angle Glaucoma

Intervention / Treatment
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* Diagnostic Test: Topological perception test


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Aged between 18-55; Best corrected visual acuity ≥ 0.6, capable of completing routine glaucoma examinations; Spherical equivalent < 3D； No history of other ocular diseases (except mild cataract), including diabetic retinopathy, age-related macular degeneration, optical neuropathy, eye trauma, strabismus, nystagmus, severe dry eye, ptosis of the eyelid, etc. Exclusion Criteria: Unable or unwilling to sign informed consent, or cannot comply with the study protocol Diagnosed with any kind of glaucoma (based on visual field and OCT, etc) or primary angle-closure diseases(primary angle closure suspect and primary angle closure, based on gonioscopy and UBM examination); History of ocular surgeries or laser; Diagnosed with specific neurologic diseases or psychiatric disorders: Parkinson's disease, Alzheimer's disease, anxiety, depression, schizophrenia, etc.(based on scale screening) With severe systemic diseases: diabetes mellitus, hypertension(systolic pressure≥160mmHg or diastolic pressure≥100mmHg ), heart diseases, kidney diseases, rheumatological disorder, digestive diseases, cancer, etc. Pregnancy or lactation

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Group A<br>Subjects with normal topological perception | Diagnostic Test: Topological perception test<br>* Participants' topological perception are tested with self-designed devices. Participants are asked to respond to the figures shown on the screen, and a final score will appear after they finish all the questions.<br>|
| Group B<br>Subjects with abnormal topological perception | Diagnostic Test: Topological perception test<br>* Participants' topological perception are tested with self-designed devices. Participants are asked to respond to the figures shown on the screen, and a final score will appear after they finish all the questions.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Morbidity of primary open-angle glaucoma | Incidence of primary open angle glaucoma in the study subjects | From October 2018 to September 2024 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in biometric parameters of optic nerve and macular region | Biometric parameters of optic nerve include retinal nerve fiber layer (RNFL) thickness, ganglion cell layer (GCL) thickness, ganglion cell complex (GCC) thickness, etc. | From October 2018 to September 2024 | 
| Change in visual field | Mean Deviation (MD value) | From October 2018 to September 2024 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Topological perception, Glaucoma