TY - JOUR
T1 - Topographic analysis and visual acuity after radial keratotomy
AU - McDonnell, Peter J.
AU - Garbus, Jenny
AU - Lopez, Pedro F.
PY - 1988/12/15
Y1 - 1988/12/15
N2 - Using a computerized corneal topographic mapping system that allows detailed examination of the corneal curvature in the vicinity of the visual axis, we identified separate regions of differing corneal curvature in three of 11 eyes after radial keratotomy. In these eyes, the excellent uncorrected visual acuity appeared to be inconsistent with the postoperative spherical equivalent as determined by refraction and corneal curvature by standard keratometer measurements. The distinct regions of corneal curvature appeared to serve as alternative effective optical zones, thus allowing the patients to have excellent visual acuity. In essence, the cornea became a multifocal lens. Although degradation in the contrast of the image as well as monocular diplopia are possible, our patients had no significant complaints.
AB - Using a computerized corneal topographic mapping system that allows detailed examination of the corneal curvature in the vicinity of the visual axis, we identified separate regions of differing corneal curvature in three of 11 eyes after radial keratotomy. In these eyes, the excellent uncorrected visual acuity appeared to be inconsistent with the postoperative spherical equivalent as determined by refraction and corneal curvature by standard keratometer measurements. The distinct regions of corneal curvature appeared to serve as alternative effective optical zones, thus allowing the patients to have excellent visual acuity. In essence, the cornea became a multifocal lens. Although degradation in the contrast of the image as well as monocular diplopia are possible, our patients had no significant complaints.
UR - http://www.scopus.com/inward/record.url?scp=0024240144&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024240144&partnerID=8YFLogxK
U2 - 10.1016/0002-9394(88)90702-7
DO - 10.1016/0002-9394(88)90702-7
M3 - Article
C2 - 3195648
AN - SCOPUS:0024240144
SN - 0002-9394
VL - 106
SP - 692
EP - 695
JO - American journal of ophthalmology
JF - American journal of ophthalmology
IS - 6
ER -