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Year : 2019  |  Volume : 11  |  Issue : 2  |  Page : 48-53

Suture related astigmatism after penetrating keratoplasty

Department of Ophthalmology, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, Uttarakhand, India

Correspondence Address:
Dr. Anuradha Raj
Department of Ophthalmology, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Jolly Grant, Dehradun, Uttarakhand
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/sjopthal.sjopthal_20_19

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Purpose: The purpose of the study was to evaluate the influence of various factors on the astigmatism before and after suture removal after penetrating keratoplasty. Methods: This observational study was conducted in which we reviewed retrospectively the records of 51 eyes of 50 patients who underwent PK for optical purposes in between March 2013 to February 2016. Various recipient parameters like age, sex, lens status , indications of PK, grading and size of recipient graft, pre and post suture removal (SR), best-corrected visual acuity (BCVA) refractive and keratometric astigmatism(KA) with axis, central corneal thickness(CCT), IOP, and graft clarity were noted. Results: Average age of the recipient was 51.16±18.53 years. Major indication of PK was corneal opacity in 47 (54.02%). B+ grade and graft size of ≥8 mm was used in maximum cases 79 (90.80%), 50 (57.47%) respectively. Pre SR refractive and KA were 4.85±1.04D and 5.24±1.08D respectively and post SR refractive and KA were 2.56±0.74D and 2.87±0.80D respectively. Pre SR in maximum cases 67 (77.01%) refractive astigmatism was seen with in 3-6 D and post SR maximum cases 53 (60.91%) were seen with refractive astigmatism <3 D. Indications of PK showed significant relationship with KA before SR with p value of 0.01. Size of graft showed significant relationship with pre SR refractive astigmatism, pre and post SR KA (P = 0.00,0.00,0.00) respectively. Conclusion: Indications of PK and size of the graft influence astigmatism both pre and post SR after PK.

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