In this stage of ocular evaluation, a refraction value is taken with the help of an automated machine and then the distance and near visual acuity of each eye and then both eyes together with and without glasses(wherever applicable) is recorded.
The spectacle correction is then tried, called subjective refraction to achieve the best vision with the least glass power.
Please Note......
- Fluctuations in blood sugar value will change the refraction status, so diabetics must ensure good control before changing glasses
- Visual acuity or vision is the amount one sees, while refraction is power of the lens in the spectacles