High Resolution Retinal Imaging

Study Overview
=================
Brief Summary
-----------------
Studying the morphology and function of the normal and diseased retina in vivo is needed for advancing the detection, diagnosis, and treatment of retinal disease. This protocol uses an adaptive optics scanning laser ophthalmoscope (AOSLO) to image the normal and diseased retina with individual cellular resolution non-invasively. The primary objective of this study is to obtain and analyze high-resolution images of the retina, in particular by imaging the cone photoreceptor mosaic, the retinal vasculature and other retinal layers. The study design will involve case-control studies, where cases are followed over time. Subjects age 7 and older may be invited to participate. The main research procedure involves retinal imaging with the AOSLO. The primary endpoint is the observation of differences in retinal images between subjects with and without retinal diseases. These changes will be quantified by examining the cell density, size, spacing and regularity of the cone photoreceptor mosaic, as well as examining the differences between other retinal layers.

Official Title
-----------------
High Resolution Retinal Imaging

Conditions
-----------------
Stargardts, Retinitis Pigmentosa, Age-related Macular Degeneration, Choroideremia, Geographic Atrophy

Intervention / Treatment
-----------------
* Procedure: Retinal imaging


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Males or females age 7 years or older. Parental/guardian permission (informed consent) and if appropriate, child assent. Child subjects age 7-17 must give assent. Reasonable compliance with an imaging protocol as determined by the study personnel. Exclusion Criteria: Individuals that are at risk to acute glaucoma. Individuals that are photophobic and experience adverse psychological reactions to flashes of light. Ocular opacities, high refractive error, and high frequency of nystagmus as determined by the study team.

Ages Eligible for Study
-----------------
Minimum Age: 7 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Retinal degeneration<br>This group will include patients with retinal degeneration and vision abnormalities. The group will participate in retinal imaging procedures including adaptive optics imaging, optical coherence tomography and fundus photography. Vision may be assessed using microperimetry, visual fields, and visual acuity. | Procedure: Retinal imaging<br>* Retinal imaging procedures include adaptive optics imaging, optical coherence tomography and fundus photography.<br>|
| Normal control<br>This group will include individuals without retinal degeneration. The group will participate in retinal imaging procedures including adaptive optics imaging, optical coherence tomography and fundus photography. Vision may be assessed using microperimetry, visual fields, and visual acuity. | Procedure: Retinal imaging<br>* Retinal imaging procedures include adaptive optics imaging, optical coherence tomography and fundus photography.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| high-resolution images of retina | The primary objective of this study is to obtain and analyze high-resolution images of the retina in normal and diseased eyes non-invasively. | 1 day (initial visit) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cone mosaic parameters | Imaging the cone photoreceptor mosaic, and analyzing cell density, size, spacing, regularity, and other mosaic parameters in normal retina compared to diseased retina. | 1 day (initial visit) | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Retina, imaging, retinal degeneration