Cateract

Question 1

Cateract

Answer 1

Clouding of the crystalline lens

•2 main functions
•Transparent
•Refractive

Question 2

Classification

Answer 2

Unilateral due to
•Sporadic- happen on its own or from
Trauma or
-Iatrogenic- occurred from surgery e.g
•Laser for ROP
•Intraocular surgery

Question 3

Classification bilateral

Answer 3

Autosomal dominant inheritance

Question 4

When can it be diagnosed?

Answer 4

•Pre School Vision Screening

6-8 week check

Newborn examination

Question 5

How else can it be diagnosed

Answer 5

•Family history
•Screening for other condition
•Downs
•Poor visual behaviour
•Nystagmus
•Exotropia
•White reflex on photos

Question 6

Visual impact

Answer 6

It can happem anywhere on lens- capsule, nucleus or
Cortex

Question 7

Investigation

Answer 7

Bilateral cataracts will always be investigated

Unilateral isolated cataracts usually not investigated

Based on existing history and risk factors

Question 8

Other cateracts

Answer 8

White cateract- can affect any bit of the lens
Oil droplet cateract- enzyme deficiency unable to process milk
Persistent fetal vascularture