A Comparative Prospective Study of Astigmatism before & After Pterygium Excision
Authors/Creators
- 1. Associate Professor, Department of Ophthalmology, Pacific Medical College & Hospital, Udaipur
Description
Introduction: Pterygium is a common ocular degenerative disorder seen in tropical regions. It threatens the visual axis & cause a significant loss of visual acuity, flattening of corneal curvature & astigmatism. Aims & Objectives: This prospective study was undertaken to evaluate the Visual acuity, corneal refractive status & astigmatism preoperatively & postoperatively after surgical excision of the pterygium & its relationship with length of pterygium. Material & Methods: The study recruited 60 eyes of 54 patients who came to the Department of Opthalmology of our Hospital with primary pterygium. Patients having Visual loss from proximity to visual axis or threatened visual axis, restricted eye movement, irritation & cosmetic concerns were included in the study. Patients with pseudopterygium, Glaucoma, Cataract, Macular degeneration, History eye trauma, Corneal opacity & Previous eye surgery were excluded from the study. At baseline, the length of the pterygium encroaching the cornea was recorded. The patients were divided into three groups on the basis of length of pterygium. Parameters assessed preoperatively & postoperatively (At baseline, at the end of 1st week, 4th week and 9th week) were Visual acuity, keratometry, Refraction with subjective correction for astigmatism assessment. Each eye underwent bare sclera pterygium excision. The pre and postoperative parameters were compared, tabulated and analysed. Results: 79% cases having primary pterygium belonged to 25-50 yrs age range. It is more prevalent in males (55.67%) than females (44.33%). 75.35% of cases were from rural areas than 24.65% in urban areas. 84.01% patients working in outdoor had pterygium. Progressive pterygium was noted in 72.67% of patients while atrophic pterygium was noted in 27.33%. The length of pterygium ranged between 1.4 mm and 5.0 mm. The mean pterygium size was 3.25 ± 0.73 mm. 55.83% patients belonged to Group III, 25.17% patients in Group II and 19% patients in Group I. There was a statistically significant improvement in the Visual acuity up to 1-3 lines Snellen’s visual acuity after the excision. There was a statistically significant reduction of Keratometry values postoperatively at 9 weeks, which signifies reduction of corneal astigmatism after pterygium excision & as measured by subjective correction. Conclusion: Surgical excision of the pterygium results in improvement of visual acuity, reduction of astigmatism postoperatively. Early seeking of surgical treatment can result in better clinical benefits in all the three grades of pterygium. Residual astigmatism is more in cases with advanced pterygium Group III as compared to Group I and II cases.
Abstract (English)
Introduction: Pterygium is a common ocular degenerative disorder seen in tropical regions. It threatens the visual axis & cause a significant loss of visual acuity, flattening of corneal curvature & astigmatism. Aims & Objectives: This prospective study was undertaken to evaluate the Visual acuity, corneal refractive status & astigmatism preoperatively & postoperatively after surgical excision of the pterygium & its relationship with length of pterygium. Material & Methods: The study recruited 60 eyes of 54 patients who came to the Department of Opthalmology of our Hospital with primary pterygium. Patients having Visual loss from proximity to visual axis or threatened visual axis, restricted eye movement, irritation & cosmetic concerns were included in the study. Patients with pseudopterygium, Glaucoma, Cataract, Macular degeneration, History eye trauma, Corneal opacity & Previous eye surgery were excluded from the study. At baseline, the length of the pterygium encroaching the cornea was recorded. The patients were divided into three groups on the basis of length of pterygium. Parameters assessed preoperatively & postoperatively (At baseline, at the end of 1st week, 4th week and 9th week) were Visual acuity, keratometry, Refraction with subjective correction for astigmatism assessment. Each eye underwent bare sclera pterygium excision. The pre and postoperative parameters were compared, tabulated and analysed. Results: 79% cases having primary pterygium belonged to 25-50 yrs age range. It is more prevalent in males (55.67%) than females (44.33%). 75.35% of cases were from rural areas than 24.65% in urban areas. 84.01% patients working in outdoor had pterygium. Progressive pterygium was noted in 72.67% of patients while atrophic pterygium was noted in 27.33%. The length of pterygium ranged between 1.4 mm and 5.0 mm. The mean pterygium size was 3.25 ± 0.73 mm. 55.83% patients belonged to Group III, 25.17% patients in Group II and 19% patients in Group I. There was a statistically significant improvement in the Visual acuity up to 1-3 lines Snellen’s visual acuity after the excision. There was a statistically significant reduction of Keratometry values postoperatively at 9 weeks, which signifies reduction of corneal astigmatism after pterygium excision & as measured by subjective correction. Conclusion: Surgical excision of the pterygium results in improvement of visual acuity, reduction of astigmatism postoperatively. Early seeking of surgical treatment can result in better clinical benefits in all the three grades of pterygium. Residual astigmatism is more in cases with advanced pterygium Group III as compared to Group I and II cases.
Files
IJPCR,Vol14,Issue12,Article161.pdf
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Additional details
Dates
- Accepted
-
2022-12-30
Software
- Repository URL
- https://impactfactor.org/PDF/IJPCR/14/IJPCR,Vol14,Issue12,Article161.pdf
- Development Status
- Active
References
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