1. Squint/strabismus(eyes not positioned straight)
2. There is a great difference in the refractive power of both eyes
3. Cataract
4. Severe Ptosis
5. Corneal opacity
We patch the normal eye (the eye with good vision) and will force the child to see the lazy eye(the eye with less vision)which helps to improve the functionality of the eye and will help to improve Vision.