ROP

Question 1

The retina has no blood vessels until

Answer 1

fourth month of gestation

Question 2

The nasal retina is normally fully vascularized after

Answer 2

8 months of gestation

Question 3

the temporal periphery is normally fully vascularized

Answer 3

at or by 1 month after delivery

Question 4

Zone II

Answer 4

extends concentrically from the edge of zone I; its radius extends from the centre of the disc to the nasal ora serrata

Question 5

Zone III

Answer 5

consists of a residual temporal crescent anterior to zone II

Question 6

Stage 1

Answer 6

(demarcation line) is a thin, flat, tortuous, grey-white line running roughly parallel with the ora serrata. It is more prominent in the temporal periphery

Question 7

Stage 2

Answer 7

(ridge) arises in the region of the demarcation line, has height and width, and extends above the plane of the retina

Question 8

Stage 3

Answer 8

(extraretinal fibrovascular proliferation) extends from the ridge into the vitreous.

Question 9

Stage 4A

Answer 9

extrafoveal partial retinal detachment

Question 10

stage 4B

Answer 10

foveal partial retinal detachment

Question 11

‘Plus’ disease

Answer 11

tendency to progression and is characterized by dilatation and tortuosity of blood vessels involving at least two quadrants of the posterior fundus. Failure of the pupil to dilate and vitreous haze

Question 12

Aggressive posterior (‘rush’ disease)

Answer 12

uncommon but if untreated usually progresses to stage 5, sometimes within a few days

Question 13

Type 1

Answer 13

○ Any ROP stage in zone I when accompanied by plus disease ○ Stage 3 to any extent within zone I ○ Stage 2 or 3 in zone II, together with plus disease

Question 14

Type 2

Answer 14

○ Stage 1 or 2 in zone I without plus disease ○ Stage 3 ROP within zone II without plus disease

Question 15

should be screened for ROP

Answer 15

born at or before 30–32 weeks gestational age, or weighing 1500 g or less