Ophthalmology Notes @ OphthalNotes.blogspot.com

Ophthalmology Notes @ OphthalNotes.blogspot.com
A comprehensive collection of ophthalmology revision notes that cover a broad range of topics.

Retinopathy of Prematurity Classification

Retinopathy of Prematurity

Zone 1

Circle centered on nerve with radius twice the distance from nerve to fovea

Zone 2

Circle extending to ora serrata nasally

Zone 3

Temporal crescent extending to ora serrata temporally

Stage

Stage 0

Immature vascularization, no ROP

Stage 1

Demarcation line

Stage 2

Ridge

Stage 3

Extraretinal fibrovascular proliferation

Stage 4

Partial retinal detachment
Stage 4A – extrafoveal
Stage 4B – foveal

Stage 5

Total retinal detachment
Funnel: Anterior or posterior, open or closed



Plus Disease

Plus disease

– At least 2 quadrants of venous dilation and tortuosity
– Vitreous haze
– Failure of pupil to dilate
– Preretinal or vitreous hemorrhage

Pre-plus disease

Abnormal dilation and tortuosity not sufficient to meet plus criteria

Threshold disease

5 contiguous or 8 non-contiguous clock hours of extraretinal neovascularization in zone 1 or zone 2 with plus disease

Aggressive posterior ROP (rush disease)

Posterior location, prominence of plus disease, ill-defined nature of retinopathy

ETROP Classification

Type 1 ROP

Zone I, any stage with plus disease
Zone I, stage 3 without plus disease
Zone II, stage 2 or 3 with plus disease

Type 2 ROP

Zone I, stage 1 or 2 without plus disease
Zone II, stage 3 without plus disease

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