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Foveal densitometry in adult-onset diffuse drusen
A T Liem1, J E Keunen, D van Norren
1F. C. Donders Institute of Ophthalmology, University Hospital, Utrecht, The Netherlands.
American Journal of Ophthalmology
|August 15, 1992
Summary
Foveal densitometry detected early photoreceptor dysfunction in asymptomatic adults with diffuse drusen, despite normal standard retinal tests. This suggests subclinical changes in cone photopigment density.
Area of Science:
- Ophthalmology
- Retinal Imaging
- Vision Science
Background:
- Adult-onset diffuse drusen is a condition affecting the retina.
- Standard retinal function tests often appear normal in early stages.
Purpose of the Study:
- To compare foveal densitometry results with other retinal function tests.
- To identify early signs of dysfunction in asymptomatic individuals with adult-onset diffuse drusen.
Main Methods:
- Foveal densitometry was performed on five asymptomatic subjects with adult-onset diffuse drusen.
- Results were compared with standard retinal function tests (visual acuity, color vision, perimetry, electroretinography, electro-oculography).
Main Results:
- All standard retinal function tests were normal in the subjects.
- Foveal densitometry revealed decreased foveal cone photopigment density in all five subjects.
- This indicates early dysfunction at the foveal cone photoreceptor level.
Conclusions:
- Foveal densitometry can detect early, subclinical dysfunction in adult-onset diffuse drusen.
- Potential causes include retinal pigment epithelium dysfunction or cone photoreceptor issues.
- This highlights the sensitivity of foveal densitometry in identifying early retinal changes.