Paper Information

Journal:   JOURNAL OF OPHTHALMIC AND VISION RESEARCH   JULY 2011 , Volume 6 , Number 3; Page(s) 160 To 165.
 
Paper: 

IOLMASTER VERSUS MANUAL KERATOMETRY AFTER PHOTOREFRACTIVE KERATECTOMY

 
 
Author(s):  RAZMJOO HASAN, REZAEI LEILA*, NASROLLAHI KOBRA, FESHARAKI HAMID, ATTARZADEH HOSSEIN, JANBAZ FOOTAMI FARHAD
 
* ISFAHAN EYE RESEARCH CENTER, FEIZ HOSPITAL, MODARES ST., QODS SQUARE, ISFAHAN 81496, IRAN
 
Abstract: 

Purpose: To compare keratometric measurements using a Javal type manual keratometer with IOLMaster in eyes undergoing photorefractive keratectomy (PRK) for myopia.
Methods: In this comparative case series, we studied patients aged 21 to 27 years scheduled for myopic PRK. Keratometry was performed preoperatively and three months after the procedure using a Javal type manual keratometer and the IOLMaster.
We compared postoperative measurements obtained by both instruments with the clinical history method (CHM).
Results: Seventy eyes of 35 patients with mean age of 23.45±1.55 years were studied.
Mean preoperative spherical equivalent was -4.53±1.3 D. Average preoperative IOLMaster and manual keratometric readings were 45.95±1.23 D and 46.32±1.18 D, respectively. Postoperatively, mean IOLMaster measurements was 38.03±0.68 D and that of manual keratometry was 43.15±1.1 D. Compared to CHM measurements, the 95% limits of agreement were
5.95 to -0.85 for the IOLMaster and -1.44 to 4.04 for manual keratometry.
Conclusion: Keratometric measurements with the IOLMaster and a Javal type manual device are comparable after PRK; both are largely deviant from the CHM and can yield misleading results.

 
Keyword(s): KERATOMETRY, IOLMASTER, JAVAL, CLINICAL HISTORY METHOD
 
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