Prisms in contact lenses for double vision | 合法醫療器材資訊網

Doublevisionhasmanypossiblecausesandcanaffectoneorbotheyes.Thetreatmentlargelydependsonthecause,butatypeoflensescalledprismlensesin ...

Several conditions can lead to double vision, including problems that affect the cornea (the transparent, front part of the eye), lens, or nerves and muscles that control eye function.1

Double vision affects your ability to read and drive. It can also make movement challenging and potentially unsafe because you may have difficulty keeping your balance. 

Prism correction in glasses can help some people with diplopia. The prism in the lens bends the light and aligns the two images so that the eye sees only one image.2

Prism correction is only suitable for some types of double vision, however. Diplopia caused by eye muscle imbalance such as strabismus (squint), nerve-related problems such as diabetes or multiple sclerosis, and brain issues such as migraine, tumour, or stroke can benefit from prism therapy.2