What Is Dysphotopsia?

Dysphotopsia is a patient observation of an optical distortion which can be noticed on occasion. It can be caused by an indirect side-light source. It is often caused by the lens design of the implant, for example: a square edge. The sharp edge of the implant is necessary to prevent clouding of the capsule membrane. There are new plastic materials with a lower index of refraction that may reduce this optical effect. There are also other designs that may reduce the chance of dysphotopsia occurring. In summary, the lens edge, stability and aberration correction are some factors to consider.