To be used for Police Constable Candidates who have had corneal refractive surgery or phakic intra-ocular lens implants.

Participants will be assessed using Bailey-Lovie Low Contrast acuity using both eyes. They will put on welding goggles and adapt for 5 minutes.  Candidates will then be assesses using Bailey-Lovie high contrast acuity using both eyes and Bailey-Lovie low contrast acuity using both eyes while wearing goggles.