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Diagnosis & Management of Diabetic Eye Disease. Paul Chous, M.A., O.D., F.A.A.O. Specializing in Diabetes Eye Care & Education Part 3. Cataract. Hyperglycemia leads to sorbitol accumulation via aldose reductase (the polyol pathway) True diabetic “snowflake” cataracts
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Diagnosis & Management of Diabetic Eye Disease Paul Chous, M.A., O.D., F.A.A.O. Specializing in Diabetes Eye Care & Education Part 3
Cataract • Hyperglycemia leads to sorbitol accumulation via aldose reductase (the polyol pathway) • True diabetic “snowflake” cataracts • Typical age-related cataracts develop prematurely due to AGE formation • Decreased elasticity of lens proteins causes premature presbyopia and, eventually, loss of tranparency
The Maillard Reaction Advanced Glycation Endproducts: AGEs – they’re what’s for dinner
Cataract - Management • Improve & stabilize blood glucose • A1c < 6.5% (ideally) • Strive for a low standard deviation • Phacoemulsification when prudent or necessary • Much higher risk of post-operative CME and worsening retinopathy • Always address retinopathy prior to surgery
Diabetic Keratopathy • Hyperglycemia & corneal sensory neuropathy weaken hemidesmosomal attachments between the basal epithelium and its basement membrane • PEK, Erosions, Neurotrophic Keratitis & Ulceration • Increased tear osmolarity and lacrimal autonomic neuropathy result in dry eye
Prevalence of Dry Eye Syndrome and use of artificial tears is significantly higher amongst patients with diabetes and with a family Hx of diabetes Optometry. 2006 Nov;77(11):554-8 Am J Ophthalmol. 2005 Mar;139(3):498-503 Diabetic Keratopathy
Keratopathy - Management • Improve & stabilize blood glucose • Be careful with contact lenses & corneal refractive surgeries • Avoid vigorous eye rubbing • NP tears, plugs, immunomodulators, bandage SCLs, etc. as indicated • Beware infection
Key Points • Diabetes and diabetic eye disease are epidemic • Ocular complications are myriad and associated with large blood vessel disease • State-of-the-art care is evolving rapidly
“The only thing to do with good advice is to pass it on to others… It is of absolutely no use to oneself.” - Oscar Wilde