**Core Concept:** In premature infants, especially those born at lower gestational ages, a high risk of Retinopathy of Prematurity (ROP) exists. ROP is a disease affecting the blood vessels in the retina of premature infants, which can lead to blindness if left untreated.

**Why the Correct Answer is Right:** In this scenario, an infant is born at 27 weeks of gestation and weighs 1500gm. Both factors increase the risk of developing ROP. Premature infants born before 30 weeks or weighing less than 1500gm are considered high-risk for ROP. Therefore, it is essential to perform a fundus examination by an ophthalmologist promptly to detect any signs of ROP and initiate timely treatment.

**Why Each Wrong Option is Incorrect:**

A. 28 weeks: This infant is still considered high-risk due to its low gestational age, but the weight is within normal limits (>1500gm), making it a borderline case.

B. 1500gm: The weight is within normal limits, but the gestational age is still below 30 weeks, increasing the risk of ROP.

C. 30 weeks: This infant is considered low-risk due to its gestational age and weight, but the correct answer mentions high-risk infants.

D. Days: The correct answer is more in line with the need for immediate assessment and treatment rather than waiting for days.

**Clinical Pearl:** Timely referral for fundus examination by an ophthalmologist is crucial for high-risk infants to detect ROP and initiate appropriate treatment, which can potentially prevent blindness.