Diabetic Retinopathy
Conditions
Keywords
Optical Coherence Tomography Angiography, OCTA, Retinal Microvasculature, Diabetic Retinopathy, Visual Acuity, HbA1c, Vessel Density
Brief summary
This observational cross-sectional study aims to assess retinal microvascular changes using optical coherence tomography angiography (OCTA) in patients with diabetic retinopathy. The study will evaluate retinal vessel density and foveal avascular zone parameters and investigate their correlation with best-corrected visual acuity and glycemic control (HbA1c) across different stages of diabetic retinopathy. The findings may improve understanding of retinal microvascular alterations and their clinical significance.
Detailed description
Diabetic retinopathy is one of the leading causes of visual impairment worldwide. Optical coherence tomography angiography (OCTA) is a non-invasive imaging technique that provides detailed visualization of the retinal microvasculature without the need for dye injection. This observational cross-sectional study will be conducted at the Department of Ophthalmology, Faculty of Medicine, Sohag University. Adult patients diagnosed with different stages of diabetic retinopathy will undergo comprehensive ophthalmic examination, including best-corrected visual acuity assessment, fundus examination, OCT, and OCT angiography. Retinal microvascular parameters, including vessel density in the superficial and deep capillary plexuses and the foveal avascular zone (FAZ), will be measured. HbA1c values will be recorded to assess glycemic control. The primary objective is to evaluate retinal microvascular changes detected by OCTA and determine their correlation with visual acuity and glycemic control across different stages of diabetic retinopathy.
Interventions
None listed
Sponsors
Sohag University
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
\- Inclusion Criteria: * Adults aged 18 to 80 years. * Patients diagnosed with diabetic retinopathy. * Ability to undergo complete ophthalmic examination including OCT and OCT angiography. * Availability of HbA1c measurement within the study period. * Ability and willingness to provide written informed consent.
Exclusion criteria
* Previous vitreoretinal surgery. * Significant media opacity affecting image quality (e.g., dense cataract or vitreous hemorrhage). * Other retinal vascular diseases (e.g., retinal vein occlusion). * Glaucoma or optic nerve diseases affecting visual function. * High myopia (\>6 diopters). * Poor-quality OCTA images due to motion artifacts or poor fixation. * Refusal or inability to provide informed consent.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Retinal Microvascular Changes Measured by OCT Angiography | Baseline | Assessment of retinal microvascular parameters including vessel density in the superficial and deep capillary plexuses and the foveal avascular zone (FAZ) using OCT angiography, and their correlation with best-corrected visual acuity and HbA1c. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Correlation Between OCTA Parameters, Visual Acuity, and Glycemic Control | Baseline | Evaluation of the association between OCTA-derived retinal microvascular parameters, best-corrected visual acuity, HbA1c level, and the stage of diabetic retinopathy. |
Countries
Egypt
Contacts
CONTACTOmnia Mohamed Abdel Aziz, M.B.BCh
STUDY_CHAIRAhmad Gad Kamel
Faculty of Medicine, Sohag University
Outcome results
None listed