Double lateral shearing interferometer for the quantitative measurement of tear film topography.
A lateral shearing interferometer designed and built for the study of the precorneal tear film topography dynamics and its effect on visual performance is presented. Simple data processing algorithms are discussed and tested on data illustrating different tear topography features: postblink tear undulation, tear breakup, eyelid-produced bumps and ridges, bubbles, and rough precontact lens tear surfaces.
Dubra
Alfredo
A
Blackett Laboratory, Imperial College London, London SW7 2BW, UK. a.dubra@imperial.ac.uk
Paterson
Carl
C
Dainty
Christopher
C
D003315:Cornea / Q000737:chemistry* / Q000166:cytology*; D019781:Corneal Topography / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D013666:Tears / Q000737:chemistry* / Q000166:cytology*