{
  "abstract": "Background: Pterygium excision reconstitutes corneal topography and may reduce induced astigmatism, yet whether the magnitude of correction differs meaningfully between surgical techniques and pterygium grades remains insufficiently characterised. Aims and Objectives: To compare astigmatism reduction following bare sclera technique (BST) versus conjunctival limbal autograft (CLAG) across four pterygium grades in a prospective cohort. Study Design: Prospective observational comparative study. Setting: Department of Ophthalmology, Murshidabad Medical College and Hospital, Berhampore, West Bengal, India. Materials and Methods: One hundred and ninety-two adults with primary pterygium were allocated to BST (n = 96) or CLAG (n = 96). Grade was assigned per Verma et al. (Grade 1: 0–2 mm; Grade 2: 2–4 mm; Grade 3: 4–6 mm; Grade 4: 6–8 mm corneal encroachment from the limbus). Pre-operative and three-month post-operative keratometry (K1, K2) and corneal astigmatism were recorded. Statistics: Within-group comparisons employed the paired t-test; between-group comparisons employed the independent t-test; p<0.05 denoted significance. Results: Pre-operative astigmatism was comparable between groups (BST 3.37±2.38 D; CLAG 3.52±2.55 D; p>0.05). Both techniques significantly reduced astigmatism at three months (p<0.001 each). Post-operative values were 1.75±1.42 D (BST) and 1.08±0.83 D (CLAG). Grade-stratified between-group analysis revealed equivalence in Grades 1 (p=0.273) and 2 (p=0.368), but CLAG conferred superior correction in Grade 3 (t=−2.32; p=0.027) and Grade 4 (t=−3.77; p=0.0007). Conclusion: CLAG confers statistically superior astigmatic correction over BST in Grade 3 and Grade 4 pterygium, while both techniques perform equivalently in early-grade disease. Grade-stratified surgical planning is recommended for optimal refractive outcomes.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Retina, Susrut Eye Foundation and Research Centre, Berhampore, West Bengal, India",
    "Department of Ophthalmology, Mandakini Institute of Medical Sciences, Ranaghat, Nadia, West Bengal, India",
    "Department of Community Medicine, Rampurhat Government Medical College and Hospital, Rampurhat, West Bengal, India"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Saubhik Chattopadhyay"
    },
    {
      "affs": [
        1
      ],
      "name": "Anil Kumar Ghanta"
    },
    {
      "affs": [
        2
      ],
      "name": "Ophelia Mukherjee"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2t14h7pmbqhtv.bib",
  "cited_by": 0,
  "doi": "10.5281/zenodo.23554517",
  "fulltext_url": "https://gjms.gaims.ac.in/index.php/gjms/article/view/587/290",
  "id": "2t14h7pmbqhtv",
  "issns": [
    "2583-1763"
  ],
  "landing_url": "https://doi.org/10.5281/zenodo.23554517",
  "language": "en",
  "licence": "CC-BY-NC-SA",
  "licence_label": "CC BY-NC-SA",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "R5-920"
    ]
  ],
  "openalex": null,
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": "Gujarat Adani Institute of Medical Sciences",
  "ris": "https://research.draconitic.com/paper/2t14h7pmbqhtv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:44:02Z",
      "native_id": "f686a770669c45109358417c401d5563",
      "source": "doaj",
      "url": "https://doi.org/10.5281/zenodo.23554517"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "lcc:R5-920",
      "subfield": "general"
    }
  ],
  "title": "Comparative Evaluation of Postoperative Corneal Astigmatic Correction Following Pterygium Excision by Bare Sclera Technique Versus Conjunctival Limbal Autograft: A Prospective Observational Study",
  "title_text": "Comparative Evaluation of Postoperative Corneal Astigmatic Correction Following Pterygium Excision by Bare Sclera Technique Versus Conjunctival Limbal Autograft: A Prospective Observational Study",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:44:02Z",
  "url": "https://research.draconitic.com/paper/2t14h7pmbqhtv",
  "venue": "GAIMS Journal of Medical Sciences",
  "versions": []
}