Secondary Issues With Diabetic Retinopathy Flashcards
What mechanism causes neovasc glaucoma?
Arises due to retinal ischemia
When glaucoma occurs due to CRVO what is it called?
100 day glaucoma
When ischemia occurs, what happens in the anterior uvea?
VEGF stimulates the growth of new vessels on the iris and in the anterior drainage angle, the vessels obstruct the trabecular meshwork which increases IOP
How do we check the drainage angle?
With gonioscopy of the drainage angle
What happens when further and advanced neovasc occurs?
It leads to the formation of fibrous membranes and when the membranes contract they form peripheral synchaie which then close the angle and leads to an extreme increase of IOP
What cataracts are common in diabetics?
Cortical and posterior subcapsular
What is the prevalence of cataract in type 2 dm
50%
What is the prevalence of type 1 diabetics with cataract
They require surgery 20 years earlier than non diabetics
Why do cataracts occur?
Due to poor glycemic control and the duration of diabetics
How does poor glycemic control contribute to poor vision in terms of pressure
It alters the osmotic pressure in the lens and cornea inducing swelling of the lens fibres changing the refractive power
What is the optometric management for rx changes in diabetes?
Enquiring the stability of glycemic control
