|
Cycloplegic refractions particularly in younger age group |
Reason for contact lens intolerance, particularly dry eye symptoms |
Has a trial of soft contact lens wear been attempted? |
History of amblyopia |
Ultrasonic measurement of central corneal thickness to determine ablation limit |
Computerised videokeratography to exclude corneal warpage or keratoconus |
Widefield Orbscan pachymetry to assess areas of focal thinning |
Posterior corneal elevation using Orbscan to asses steepness and eccentricity |
Central corneal power |
Anterior chamber depth from endothelium |
Photopic and particularly scotopic pupil size |