Frames: A little extra care sometimes makes a big difference

Dr Narendra Kumar presents some cases where careful modification of optical appliances have addressed particular patient needs

Spectacles are the oldest and the most widely prescribed aid for the correction of refractive error. One, however, needs to turn to contact lenses when full correction in both eyes cannot be worn as in spectacle form, as for example with high anisometropia. They are also beneficial in cases of high ametropia.

Cosmetic contact lenses enable a change of eye colour and are used by fashion-conscious youngsters. Specialist contact lenses, such as reverse geometry rigid lenses, scleral and semi-scleral lenses, and hybrid lenses play designated roles, for example in orthokeratology and therapeutics.

Both spectacles and contact lenses can be used in a modified form, as I hope to make clear from the following cases.

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