Ocular Biometric Values and Prevalence of Corneal Astigmatism in Patients With Cataract
Seyed javad Hashemian1 *, Seyed Mahyar Hashemian 2 , Farid Karimian 3 , Ali Hadavandkhani4 , Mohammad Ebrahim Jafari5 , Mahsa Sadat Hashemian6 , Fatemeh Nadjafi Semnani7
- Ophthalmologist, Associate professor, Eye Research Center, Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
- General Practitioner, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Professor of ophthalmology, Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Ophthalmologist, Cornea and Refractive surgeon, Eye Research center, Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
- General Practitioner, Iranian Eye Clinic, Tehran, Iran.
- Pharm D, Eye Research Center, Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
- Eye Research Center, Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
Abstract: To present and analyze the biometric data and the prevalence of corneal astigmatism in cataract surgery candidates.
Setting: Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences and Iranian Eye Clinic, Tehran, Iran.
Design: Prospective Study
Methods: Ocular biometric and keratometric values were measured by LENSTAR LS900 before surgery in patients having cataract extraction. Descriptive statistics of biometric and keratometric cylinder data and their correlations with sex and age were evaluated.
Results: Ocular biometric and keratometric data from 2084 eyes of 2084 patients (mean age 66.43, range 19 to 95 years) were analyzed. The mean values were as follows: Corneal astigmatism 0.89 diopter (D), Mean corneal keratometry 44.29 D, Central corneal thickness 534 , Anterior chamber depth (ACD) 3.11 mm, Lens thickness 4.50 mm and Axial Length (AL) 23.35 mm. Corneal astigmatism was less than 1.25 D in 1660 (79.5%) of eyes. Astigmatism was with the rule (WTR) in 976(46.8%) of eyes, against the rule in 702(33.7%), and oblique in 406(19.5%). The ACD and axis of astigmatism were correlated with age. The amount of corneal astigmatism had no correlation with age and sex.
Conclusion: Corneal astigmatism was higher than 1.25 D in about 21% of cataract surgery candidates with slight differences between the various age ranges and had no correlation with age and sex.
