Eyeglass Lenses

They have sophisticated lens design software that allows correction levels beyond those of even optimally fitted, corrective curve lenses, They allow a wide choice of materials with different indices, or types such as photo-chromatic, polarized, etc, They make it possible to optimize sphero-cylindrical prescriptions in their peripheral regions.
Their performance can be further optimized or enhanced using personal factors such as frame size, shape, frame curve, horizontal PD and monocular pupil heights.
Images that are at a distance appear blurred, whereas images that are at a closer proximity are in focus are corrected with minus power lenses.