Sir, My mother had an operation to her right eye 3 years ago. After few days of operation she said that there is something in her eye. Then the doctor said that its your feeling only. After few days my mother is saying that the vision of left eye is better compared to right eye. Some times my mother said that, the right eye is paining. We consult an ophthalmologist. He tested her eye and said that we should make an OCT scan for both the eyes because her Retina is weak. Is it necessary. If so, what is the necessity of making an OCT scan. Then what is the use of making an operation.