Changes in keratometry and refractive status pre and post pterygium surgery

Vadodaria, Bansari; Thakre, Aishwariya; Maheshgauri, Rupali; Motwani, Divya; Mishra, Ashish

doi:10.18231/j.ijooo.2019.049

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…There was a significant reduction in astigmatic error after pterygium excision with conjunctival autograft with or without suture (p = 0.000). 15 Xu G, et al in their study on "Pattern of corneal astigmatism induced by primary pterygium in patients with cataract in a secondary hospital in Southern China: a crosssectional study." Showed that the mean corneal astigmatism was significantly higher in the primary pterygium (PT) group than without pterygium (NPT) group.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of changes in the keratometric values after pterygium excision with conjunctival autografting in different grades of pterygium

Damle¹,

Laad

Agarwal³

2021

IJCEO

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To study the changes in keratometric values after pterygium excision with conjunctival autograft in different grades of pterygium. A retrospective, comparative study was done on 75 patients of various grades of pterygium who underwent excision surgery with conjunctival autograft. Preoperative and postoperative details of all the patients on 1, 7 and 30 day were taken into account including detailed ocular examination, best-corrected visual acuity, slit-lamp biomicroscopic examination, keratometric details and posterior segment examination. Net astigmatism was calculated preoperatively and on post-op examinations. Mean of difference in preoperative and post operative net astigmatism is calculated and compared in different grades of pterygium. Our study showed that there are significant changes in net astigmatism after pterygium excision mainly in grade 3 pterygium. Difference in mean net astigmatism at the end of 1 month from preoperative values was 2.39±0.73 in Group C, 1.45±0.5 in Group B and 0.49±0.24 in group C and this difference is significant. The amount of keratometric astigmatism is proportional to grades of pterygium (size of pterygium) and pterygium excision reduces the induced astigmatism and it varies according to grades.

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Section: Discussionmentioning

confidence: 99%

Evaluation of changes in the keratometric values after pterygium excision with conjunctival autografting in different grades of pterygium

Damle¹,

Laad

Agarwal³

2021

IJCEO

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“…The exact cause of change in topography of cornea due to pterygium is not clearly recognised however, different theories suggest that alteration in tear film and pulling of cornea due to pterygium tissue lead to distortion of cornea (Makkar et al, 2015;Meitei et al, 2016). As the pterygium encroaches towards the cornea, formation of tear meniscus takes place between apex of the cornea and pterygium tissue that cause apparent flattening of corneal meridian (Yousuf, 2005;Vadodaria et al, 2019). Thus, pterygium can induce astigmatism by involving the corneal meridia which in turn will lead to refractive changes.…”

Section: Discussionmentioning

confidence: 99%

“…Several previous studies have stated that the pterygium induced changes of corneal curvature are significant astigmatism and visual disturbances (Khan et al, 2014;Shelke et al, 2014). Studies indicate that in the majority of pterygium patients, localized flattening of the corneal curvature usually occurs at horizontal meridian, which results in with-the-rule astigmatism (Radadia, 2014;Vadodaria et al, 2019). However, other studies suggested that in some cases against-the-rule or oblique astigmatism can also be induced by the pterygium (Chourasia et al, 2014;Popat et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of change in pterygium induced keratometric astigmatism in patients following pterygium excision with autologous graft surgery

Jain¹,

Pandey

2020

Nep J Oph

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Introduction: Pterygium is a common surface disorder of the eye that may cause change in visual acuity of patients by inducing astigmatic refractive error. Surgical excision with grafting is considered the most effective recommended treatment for pterygium. The objective of this study was to evaluate the outcomes of pterygium excision with autologous graft surgery on keratometric astigmatism and visual acuity. Materials and methods: In this study total 64 eyes of 64 patients were enrolled having the diagnosis of pterygium. Prior to the pterygium excision surgery all the enrolled patients were studied for grading of pterygium, clinical symptoms, keratometric values and best corrected visual acuity (BCVA). Postoperatively, BCVA and keratometric readings were recorded at one week, one month, two months and four months intervals. Results: Mean age of study participants was 34.16 ± 8.24 years in the age group of 18-60 years. 42 (65.62%) eyes had grade II pterygium, while 16 (25.0 %) and 6 (9.38%) eyes were having grade III and grade IV pterygium, respectively. Preoperative median and quartiles (25% -75%) horizontal and vertical keratometric values were 43.00 (42.50-44.00) D and 44.25 (43.75-44.50) D, respectively and both reduced significantly to 42.50 (42.50-42.94) D and 42.50 (42.50- 43.00) D, respectively after four months postoperatively. Median keratometric astigmatism before surgery was 1.37 (1.25-1.93) D which reduced significantly to 0.50 (0.32-0.75) D after four months of pterygium excision. Similarly, BCVA improved significantly [0.20(0.16-0.25) vs 0.53 (0.50-0.80)] when assessed postoperatively after four months. Conclusion: Excision of pterygium with autologous graft reduced pterygium-induced keratometric astigmatism and improved BCVA significantly.

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Changes in keratometry and refractive status pre and post pterygium surgery

Cited by 2 publications

References 11 publications

Evaluation of changes in the keratometric values after pterygium excision with conjunctival autografting in different grades of pterygium

Evaluation of changes in the keratometric values after pterygium excision with conjunctival autografting in different grades of pterygium

Evaluation of change in pterygium induced keratometric astigmatism in patients following pterygium excision with autologous graft surgery

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