Decreased Best Spectacle-Corrected Visual Acuity (BSCVA) after Photorefractive Keratectomy (PRK/PARK) has been reported. We have also observed BSCVA in a certain number of patients, which we attribute to a different reaction of the corneal tissue due to several factors. The development of a mathematical simulation model based on experimental data can reduce the cases of decreased BSCVA. In this view we have designed and developed an optical device that can work as modified Twymann-Green interferometer and shearographic unit. We propose and discuss the application of this combined Interferometry/Shearography system (I/S-s) for corneal measurement in vivo to minimize the risks of decreased BSCVA.

Topics
Shearography, Interferometry, Photorefractive keratectomy, Visual system
1.
Garcia
D.D.
,
van de Pol
C.
,
Klein
S.A.
 and
B.B.
Barsky
. Wavefront Coherence Area for Predicting Visual Acuity of Post-PRK and Post-PARK Refractive Surgery Patients, Ophthalmic Technologies IX,
SPIE International Symposium on Biomedical Optics
,
San Jose
,
California
:
January
1999
, pp.
23
–
29
Google Scholar
 
2.
Garcia
D.D.
,
Barsky
B.B.
 and
S.A.
Klein
. CWhatUC: A Visual Acuity Simulator”, Conference on Human Vision and Electronic Imaging,
SPIE/IS & T Symposium on Electronic Imaging: Science and Technology
,
San Jose
,
California
:
January
1998
,
24
–
30
Google Scholar
 
3.
Calkins
J. L.
Holography: a review of potential applications in ophthalmology
.
Sight Surveying Review
,
42
:
1972
; pp.
133
–
144
Google Scholar
 
4.
Von Bally
G.
Holography in Medicine and Biology
,
Springer-Verlag
,
1979
Google Scholar
 
5.
Kasprzak
H.
,
Forster
W.N.
 and
G.
von Bally
.
Holographic measurement of changes of the central corneal curvature due to intraocular pressure differences
.
Optical Engineering
, Vol.
33
No.
1
:
January
1994
; pp.
198
–
203
https://doi.org/10.1117/12.149135
Google Scholar
 
6.
Friedlander
M.H.
,
Mulet
M.
,
Buzard
K.
,
Granet
N.
 and
P.
Baker
,
Holographic Interferometry of the Corneal Surface. Holography
.
Interferometry and Optical Pattern Recognition in Biomedicine
, SPIE Vol.
1429
:
1991
; pp.
229
–
236
https://doi.org/10.1117/12.44675
Google Scholar
 
7.
Matsuda
T.
,
Saishin
S.
,
Nakao
S.
,
Matsumoto
T.
,
Iwata
K.
 and
R.
Nagata
. Holographic Measurement of Rabbit-Eyeball Deformations Cause by Intraocular Pressure Change.
G.
von Bally
.
Optics in Biomedical Sciences
,
Springer-Verlag
,
New York
,
1982
; pp.
134
–
146
Google Scholar
 
8.
Ohzu
W.
 and
T.
Kawara
. Holography in Ophthalmology.
G.
von Bally
.
Optics in Biomedical Sciences
,
Springer-Verlag
,
New York
,
1982
; pp.
134
–
146
Google Scholar
 
9.
Mosby. Ophthalmology
.
Principles and Concepts
. Sixth Edition,
1986
This content is only available via PDF.
© 2000 Laser Institute of America.
2000
Laser Institute of America
You do not currently have access to this content.