Do her eye color and pupils look alike and normal? Sometimes in oular Mareks the eye can turn gray, and the pupil can become irregular shaped or pinpoint. Mareks can strike at this age, but let's hope that it is just a vitamin deficiency. Vitamin A deficiency can cause eye problems.
Welcome to BYC. Was she vaccinated for Mareks disease? I would start her on some poultry vitamins just in case of vitamin B 2 (riboflavin) deficiency. Riboflavin deficiency can cause curled under toes and walking on hocks. If not treated early on, it can become permanent.