Age of my son is 8 years and he is wearing specs from last four years. Last year my son was diagnosed with keratoconus in right eye and posterior dystrophy in left eye. We have done pentacam test twice in six month but doctor has found no variation in report means it might be stabilize .but we need to change his glass every three month .his power is increasing by -0.5 in every check up our main concern is that if keratoconus is some how stabilize then why power is increasing. This time his power is - 4.75 in both eye.