Developed in collaboration with CASA Medical.
Keratoconus is a bilateral and asymmetric disease which results in progressive thinning and steeping of the cornea leading to irregular astigmatism and decreased visual acuity. The cause is mostly unknown but can run in families. The main symptoms include image distortion, sensitivity to light, monocular double vision and seeing halos around bright lights. Treatment, if required, includes intracorneal ring segments / keraring, corneal crosslinking, contact lenses or in more severe cases corneal transplant. There are stand down periods associated with treatment.
Certification is possible when the condition and any treatment response to vision correction and treatment is stable. A shortened certification period may be required to allow for regular monitoring of vision. However, if the condition remains mild and has proven itself to be stable over several years, a reduced surveillance may later be considered.
Due to the progressive nature of this condition, and its effects on vision regular optometrist / ophthalmologist review will be required. If the visual requirements can only be met with contact lens restrictions may be applied on the medical certificate.
This condition may progress and may affect future certification decisions.
This guidance should be used for applicants diagnosed with keratoconus by an Ophthalmologist or Optometrist.
For more information, see Medical Manual: Keratoconus.
