Human tear film pre-rupture phase time (TP-RPT)--a non-invasive technique for evaluating the pre-corneal tear film using a novel keratometer mire.
A non-invasive method of assessing the stability of the human pre-corneal tear film is described using a novel keratometer mire designed in the form of a grid pattern (HIR-CAL Grid). In a laboratory environment, the technique measures with ease and little variability the time taken for the tear film to loose stability and enter the pre-rupture phase (TP-RPT) before rupturing (BUT). This technique may prove useful in evaluating the stability or otherwise of the pre-corneal tear film of prospective contact lens wearer and the pre-contact lens tear film stability on differing current and new contact lens materials.
Hirji
N
N
Department of Ophthalmic Optics, Glasgow College of Technology, UK.
Patel
S
S
Callander
M
M
D001767:Blinking / Q000502:physiology*; D003261:Contact Lenses; D003315:Cornea / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D013666:Tears / Q000378:metabolism*