Open AccessPterygium-induced corneal refractive changes
Author(s) -
Sejal Maheshwari
Publication year - 2007
Publication title -
indian journal of ophthalmology/indian journal of ophthalmology
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.542
H-Index - 51
eISSN - 1998-3689
pISSN - 0301-4738
DOI - 10.4103/0301-4738.33829
Subject(s) - medicine , pterygium , dioptre , ophthalmology , astigmatism , cornea , corneal topography , visual acuity , optics , physics
To study the effect of pterygium on corneal topography, a retrospective analysis of 151 eyes with primary pterygia was done. All cases underwent videokeratography preoperatively and one month postoperatively. Statistical analysis of average corneal power (ACP), corneal astigmatism, surface regularity index (SRI) and surface asymmetry index (SAI) was done before and one month after surgery. Topographic indices were compared statistically for various grades of pterygia. Increase in the grade of pterygia had a significant effect on topographic indices. Corneal astigmatism reduced from 4.40+/-3.64 diopter (D) to 1.55+/-1.63D ( P value < 0.001) following surgery. The regularity of corneal surface improved and asymmetry of the cornea reduced one month after surgery. Pterygium leads to significant changes in corneal refractive status, which increase with the increase in the grade of pterygia and improve following pterygium excision.