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Ocular autonomic nerve function in proliferative diabetic retinopathy
1Department of Ophthalmology, University of Edinburgh.
Eye (London, England)
|January 1, 1988
Summary
Diabetic patients with proliferative retinopathy exhibit significant ocular autonomic nerve dysfunction. Pupil cycle time is often absent, and both parasympathetic and sympathetic denervation hypersensitivity are increased.
Area of Science:
- Ophthalmology
- Neurology
- Diabetology
Background:
- Diabetic retinopathy is a leading cause of vision loss.
- Ocular autonomic nerve function plays a role in maintaining visual health.
- Proliferative diabetic retinopathy (PDR) may be associated with autonomic dysfunction.
Purpose of the Study:
- To assess ocular autonomic nerve function in patients with PDR.
- To compare autonomic function between PDR patients and healthy controls.
- To investigate the prevalence of autonomic denervation hypersensitivity in PDR.
Main Methods:
- Pupil cycle time measurement.
- Iris autonomic denervation hypersensitivity testing using methacholine and phenylephrine.
- Comparison between 28 PDR patients and 61 age/sex-matched controls.
Main Results:
- Sustained pupil cycle time was absent in 88.5% of PDR patients vs. 9.8% of controls (p<0.001).
- Parasympathetic denervation hypersensitivity (methacholine) was significantly increased in PDR (p<0.001).
- Sympathetic denervation hypersensitivity (phenylephrine) was also significantly higher in PDR (p<0.001).
- Abnormal pupil reflexes were observed in 88.5% of PDR patients, with 57% showing established autonomic denervation hypersensitivity.
Conclusions:
- Diabetic patients with PDR demonstrate significant ocular autonomic nerve dysfunction.
- Both parasympathetic and sympathetic denervation hypersensitivity are prevalent in PDR.
- These findings highlight the impact of diabetes on ocular autonomic nerves.