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Hermansky-Pudlak syndrome. Ophthalmic findings
C G Summers1, W H Knobloch, C J Witkop
1Department of Ophthalmology, University of Minnesota Medical School, Minneapolis 55455.
Ophthalmology
|April 1, 1988
Summary
Hermansky-Pudlak syndrome, a form of oculocutaneous albinism, causes significant vision impairment including nystagmus and foveal hypoplasia. Ocular findings in this condition do not correlate with hypopigmentation levels.
Area of Science:
- Ophthalmology
- Genetics
- Hematology
Background:
- Hermansky-Pudlak syndrome is an oculocutaneous albinism characterized by platelet dense body deficiency.
- It is associated with systemic manifestations affecting multiple organs.
Purpose of the Study:
- To evaluate the ophthalmic characteristics of individuals with Hermansky-Pudlak syndrome.
- To investigate the relationship between visual impairment and the degree of hypopigmentation.
Main Methods:
- Prospective ophthalmic examination of 20 individuals with Hermansky-Pudlak syndrome.
- Assessment of visual acuity, refractive error, iris pigmentation, and funduscopic findings.
- Visual-evoked potentials (VEPs) were performed in 11 patients.
Main Results:
- All patients exhibited nystagmus and foveal hypoplasia.
- Visual acuity ranged from 20/60 to 20/400, with mild improvement after refractive correction.
- Iris pigmentation varied and did not correlate with visual acuity; VEPs showed excessive optic fiber decussation.
Conclusions:
- Ophthalmic findings in Hermansky-Pudlak syndrome are significant and include nystagmus and foveal hypoplasia.
- Visual impairment is not directly correlated with the degree of hypopigmentation.
- Awareness of Hermansky-Pudlak syndrome is crucial due to its systemic complications.