Question

what are the major modifications possible in contacts​

Answer 1

The major modifications possible in contacts:

• The in-line modifications will include reducing the overall diameter, reducing the optical zone diameter, flattening the peripheral curves, blending the peripheral curves, polishing the edges, anterior and posterior surfaces, and modifying lens power.
• There are techniques for verifying that modifications have been performed accurately; outline which procedures are best left to the lens manufacturer for modification; identify what unwanted changes are most likely to occur during lens modification and steps to be performed to reduce the likelihood of occurrence.