Correcting higher-order aberrations with Definition HD contact lenses

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Until recently it was not possible to measure or correct these imperfections for many of these patients, symptoms manifest when driving at night or while in reduced light conditions. Typical experiences are 'comet tails', halos, glare around lights at night or in reduced light conditions and these effects result in compromised near and distance vision.

Approximately 50 per cent of people have HOA that compromise subjective vision, while a further 17 per cent have seriously compromised vision as a result of HOA. HOA can make up as much as 20 per cent of refractive error. Until recently it was not possible for practitioners to easily test for and correct this component of refractive error.