Error of refraction in a child
Because of the strong power of accommodation (shifting from distance to near use of eyes) in children, refraction test in children is done on dilated pupils, and it takes an extra visit to the eye doctor’s clinic. Prescribing of glasses for children also calls for extra care, and in some cases rather than full correction being prescribed in one go, it is increased in increments so as to ensure comfortable wearing of glasses.
Parents are naturally worried about the changing power of spectacles on almost every yearly (or half-yearly in some cases) visit to the clinic. But slight increase in number with body growth is normal, and not that alarming. If there is abnormal change in power, however, then there is need for further investigation.
There is no formula to stop the progression of a refractive error except that balanced diet does help towards the overall health of the body, of which the eyes are also a part. But, at the same time, not going in for a change in the power of spectacles, as prescribed by the eye doctor, may lead to less than optimum vision and eye-strain.
This is not a rule though that the number of spectacles will always increase; in some cases there may well be even reduction in number (notably in hypermetropia). And the best advice would be for any parent to go by the Rx of your eye doctor for your child at the time of periodic (usually yearly) eye examination.
Dr. Narendra Kumar more