Paper Information

Journal:   BINA   WINTER 2011 , Volume 16 , Number 2 (63); Page(s) 124 To 129.
 
Paper: 

PTERYGIUM AND OCULAR ABERRATIONS

 
Author(s):  ZARE M.*, ZAREI GHANAVATI S., ANSARI ASTANEH M.R., BARADARAN RAFIEE A.R., EINOLAHI B., DOOZADNDE A.
 
* OPHTHALMIC RESEARCH CENTER, SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCES, TEHRAN, IRAN
 
Abstract: 

Purpose: To evaluate the effect of pterygium on ocular high order aberrations.
Method: This study was performed on 31 eyes with pterygia and 31 normal fellow eyes. NIOEK OPO-Scan wavefront aberrometry was performed on all eyes. Root mean square (RMS) values of total high order aberrations, coma-like aberrations, sphere-like aberrations, third, fourth and fifth order aberrations, total trefoil aberrations and spherical aberrations were compared between the two eyes. According to the size of uninvolved optical zone, pterygia were classified into three groups and aberrometric parameters were evaluated in each group and compared with each other.
Results: RMS of total high order aberration was significantly highet in eyes with pterygia as compared to normal fellow eyes (1.85
±2.22 mm vs 0.36±0.44 mm, P=0.001). RMS values of other types of aberrations were also higher in the involved eyes except for spherical aberration. The most significant differences were found in RMS values of total trefoil (1.37 mm vs 0.25 mm, P<0.001) and total coma (0.37 mm vs 0.14 mm, P<0.001).
With increasing pterygium size, RMS values of all aberrations except spherical aberration increased.
Conclusion: Pterygia significantly increase higher order aberrations especially total coma and total trefoil as compared to the normal fellow eye. This effect seems to correlated with the size of the lesion.

 
Keyword(s): PTERYGIUM, ABERRATION
 
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