How many zones are in ROP?

In ROP cases, “zones” refer to specific locations of the eye. There are three zones: Zone 1, Zone 2 and Zone 3. Zone 1 covers the optic nerve in the center, Zone 2 covers the area just outside of Zone 1. Zone 3 consists of a crescent-shaped area beyond Zone 2.

What are the stages of ROP?

Are there different stages of ROP?

  • Stage I — Mildly abnormal blood vessel growth.
  • Stage II — Moderately abnormal blood vessel growth.
  • Stage III — Severely abnormal blood vessel growth.
  • Stage IV — Partially detached retina.
  • Stage V — Completely detached retina and the end stage of the disease.

What is Stage 3 zone 2 ROP?

Zone 2 is the intermediate (between the posterior and peripheral) retina. Zone 3 involves the peripheral (or outer) retina. The retinal vessels begin to develop in zone 1 and then gradually grow outward to the retinal periphery until reaching zone 3; thus, zone 1 involvement is more severe than zone 3 involvement.

What is Stage 2 zone 2 ROP?

Stage 2 ROP In Stage 2, the line between the areas with and without blood vessels widens and thickens into a ridge. The condition may still resolve, or it may progress to Stage 3 ROP.

What is Stage 0 retinopathy of prematurity?

Stage 0 is the mildest form of ROP while Stage 5 is the most severe indicating total retinal detachment. Doctors may also use the terms “popcorn” referring to a scarring that is regressing following abnormal vessel growth. The term, “hot dog”, may refer to a red hot ridge of increasing abnormal vessel grow.

What does ROP Stage 0 mean?

Disease Severity (Stage) Prior to the development of ROP in the premature infant, vascularization of the retina is “incomplete” (Stage 0).

What is type1 ROP?

ROP was documented according to the International Committee for the Classification of Retinopathy of Prematurity[1]. Type 1 ROP is defined as: (1) any ROP with plus disease in zone I; (2) stage 3 ROP in zone I; (3) stage 2 or 3 ROP with plus disease in zone II[9].

What is ROP in NICU?

Retinopathy of prematurity (also called ROP) is an eye disease that affects many premature babies. A premature baby is one who is born too early, before 37 weeks of pregnancy. ROP happens when a baby’s retinas don’t fully develop. The retina is the nerve tissue that lines the back of the eye.

What is Threshold disease in ROP?

Threshold ROP was defined as a condition with 50% risk of retinal detachment if left untreated. This includes ROP of more than 5 contiguous or 8 cumulative clock hours of stage 3 plus ROP in zone 1 or zone 2. All eyes with threshold disease were recommended to be treated.