Understanding eye deformation in non-contact tonometry.
Non-contact tonometers are widely used to measure the internal eye pressure, i.e. the IntraOcular Pressure (IOP), which is an important parameter for the diagnosis and treatment of glaucoma. During the measurement, the eye is deformed by a short air pulse. Commonly the pressure dependent deformation is estimated from the time when the eye becomes flat, which is derived from the monitored reflection of an incident infrared light. We used a high speed camera to capture the complete motion of the eye directly and obtain more data during the pressure measurement. Assuming a simple eye model with non-linear material properties of the cornea, we extend our previous analysis of the motion of the eye, and obtain a similar principle shape of the eye deformation as observed in the experiments.
Kempf
Roland
R
Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Japan. info@r-kempf.de
Kurita
Yuichi
Y
Iida
Yoshichika
Y
Kaneko
Makoto
M
Mishima
Hiromu K
HK
Tsukamoto
Hidetoshi
H
Sugimoto
Eiichiro
E
D000328:Adult; D000367:Age Factors; D000368:Aged; D003941:Diagnostic Techniques, Ophthalmological; D004867:Equipment Design; D005123:Eye / Q000473:pathology*; D005133:Eye Movements; D005901:Glaucoma / Q000175:diagnosis* / Q000473:pathology*; D006801:Humans; D007259:Infrared Rays; D007429:Intraocular Pressure; D008027:Light; D019047:Phantoms, Imaging; D013997:Time Factors; D014065:Tonometry, Ocular / Q000295:instrumentation* / Q000379:methods*