Related Experiment Video
Updated: Jul 7, 2026

07:07
Efficient Derivation of Retinal Pigment Epithelium Cells from Stem Cells
Published on: March 8, 2015
[Reticular degeneration of retinal pigment epithelium]
1Department of Ophthalmology, Hamamatsu University School of Medicine, Japan.
Nippon Ganka Gakkai Zasshi
|September 1, 1992
Summary
Reticular degeneration of the retinal pigment epithelium (RDRPE) affects over 1% of patients. This condition progresses from nasal quadrants to all peripheral retina quadrants, particularly in older individuals.
Area of Science:
- Ophthalmology
- Retinal Imaging
- Pigment Epithelium Research
Context:
- Fluorescein angiography is a key diagnostic tool.
- Reticular degeneration of the retinal pigment epithelium (RDRPE) is a specific finding.
- Prevalence noted in 1.06% of analyzed angiograms.
Purpose:
- To characterize the prevalence and patterns of RDRPE.
- To understand the age-related progression of RDRPE.
- To investigate the relationship between RDRPE and posterior pole degeneration.
Summary:
- RDRPE identified in 33 of 3114 angiograms (1.06%), peaking in the 8th decade (avg. age 73).
- Bilateral RDRPE observed in 85% of cases.
- Early RDRPE (ages 50-70) presents as linear, incomplete polygons nasally; advanced RDRPE (>70) shows complete polygons across nasal and temporal quadrants.
Impact:
- RDRPE initially manifests nasally and progresses to a generalized pattern.
- Findings suggest RDRPE is linked to pigment epithelium degeneration at the posterior pole.
- Establishes a developmental pattern for RDRPE in peripheral retinal imaging.
More Related Videos
Related Concept Videos
Anatomy of the Eyeball
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Diabetic Retinopathy
DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...

