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Rotational stability of Toric intraocular lenses
Affiliation:1. Graded Specialist (Ophthalmology), Military Hospital, Agra, India;2. Senior Adviser (Ophthalmology), Base Hospital, Delhi Cantt, India;3. Commandant, Military Hospital, Jhansi, India;4. Classified Specialist (Ophthalmology), Base Hospital, Delhi Cantt, India;1. Graded Specialist (Pharmacology), Armed Forces Medical Stores Depot, Lucknow, India;2. Senior Advisor & Head (Psychiatry), Base Hospital, Delhi Cantt, India;3. Graded Specialist (Psychiatry), Base Hospital, Delhi Cantt, India;4. Tutor (Pharmacology), Army College of Medical Sciences, Delhi Cantt, New Delhi, India;5. Associate Professor (Pharmacology), Army College of Medical Sciences, Delhi Cantt, New Delhi, India;1. Resident, Department of Dental Surgery & Oral Health Sciences, Armed Forces Medical College, Pune 411040, India;2. Associate Professor, Department of Dental Surgery & Oral Health Sciences, Armed Forces Medical College, Pune 411040, India;3. Assistant Professor, Department of Dental Surgery & Oral Health Sciences, Armed Forces Medical College, Pune 411040, India;1. Resident, Department of Surgery, Armed Forces Medical College, Pune, 411040, India;2. Senior Advisor (Surgery & Pediatric Surgery), Command Hospital (Southern Command), Pune, 411040, India;3. Classified Specialist (Surgery & Pediatric Surgery), Command Hospital (Southern Command), Pune, 411040, India;4. Senior Advisor (Anaesthesia & Pediatric Anaesthesia), Command Hospital (Southern Command), Pune, 411040, India;1. Classified Specialist (Pulmonary Medicine), INHS Asvini, Colaba, Mumbai, India;2. Consultant and Head (Obstetrics and Gynaecology), INHS Asvini, Colaba, Mumbai, India;3. Graded Specialist (Pathology), INHS Asvini, Mumbai, India;4. Senior Advisor (Obstetrics and Gynaecology), INHS Asvini, Mumbai, India;1. Senior Registrar & OC Tps, Military Hospital Dehradun, India;2. Professor, Dept of Sports Medicine, Armed Forces Medical College, Pune 411040, India;3. Professor & Head, Dept of Sports Medicine, Armed Forces Medical College, Pune 411040, India;4. Commanding Officer, 436 Field Hospital, C/O 56 APO, India;5. Consultant (Biostatistician), Army Sports Institute, Pune 411036, India;6. Senior Resident, Dept of Sports Medicine, Armed Forces Medical College, Pune 411040, India;7. MO (Sports Medicine), Army Sports Institute, Pune 411036, India
Abstract:BackgroundA prospective study to evaluate the rotational stability of toric intraocular lenses (IOLs).MethodsA prospective study of 30 eyes in 29 patients. All patients with regular astigmatism of range 0.75–4 D were included in the study. Exclusion criteria included irregular corneal astigmatism, post-refractive surgery and corneal dystrophies. All patients underwent uncomplicated phacoemulsification cataract surgery by the same surgeon. Three eyes with corneal astigmatism of 0.75–1.5 D were implanted with the AcrySof SA60T3 IOL, eight eyes with astigmatism between 1.5 and 2.0 D received the SA60T4 IOL and eight eyes with astigmatism between 2.0 and 2.50 D received the SA60T5 and rest with astigmatism of 2.5 D and higher received SA60T6 and above models. Main outcome measure was the post-operative position of the lens, assessed at day 1, 1 week, 1 month and 6 months, using toric marker and the slit lamp.ResultsThere was no significant rotation of IOL observed during a follow-up period of 6 months. Overall, the post-operative rotation was within 5° in 95% of cases. There was no trend for either clockwise or anti-clockwise rotation. However, IOL rotation happens mostly within the first month of surgery, and if it is significant, it requires early repositioning.ConclusionToric IOLs are very effective and consistent in correcting astigmatism during the cataract surgery. Once placed to its position, toric IOLs demonstrate rotational stability in the capsular bag.
Keywords:Astigmatism  Cataract surgery  Toric lenses  Toric intraocular lenses
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