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Self assessment

Ortho-K Candidacy Awareness Tool

A quick check of the practical factors that affect whether overnight lenses suit someone. Real candidacy is decided from a corneal topography map, so no questionnaire can answer it, including this one.

Ortho-K candidacy is decided from the shape of your cornea rather than from your prescription number, which means it can only be answered by mapping. What this tool covers is the practical side: prescription range, sleep pattern and daily routine.

This runs entirely in your browser. Nothing is sent anywhere and nothing is stored.

Self assessment questions

1.Are you nearsighted?

Ortho-K corrects nearsightedness. It does not address long sightedness or presbyopia.

2.Roughly how strong is your prescription?

Ortho-K works best up to about six dioptres, though modern designs stretch further.

3.How many hours do you usually sleep?

Around six hours is the practical minimum for the correction to hold through a full day.

4.Could you commit to putting lenses in every night?

5.What is drawing you to this?

6.Do you have any diagnosed corneal condition, such as keratoconus?

7.Do your eyes feel dry or irritated most days?

0 of 7 answered

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