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ORIGINAL ARTICLE
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Limbal ischemia: Reliability of clinical assessment and implications in the management of ocular burns


1 Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital; Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Sha Tin, Hong Kong
2 Brien Holden Eye Research Center, LV Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, Telangana, India
3 Himalayan Cataract Project, Stanford University, Stanford, CA, USA
4 Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong; Department of Mathematics and Statistics, Hang Seng Management College, Sha Tin, Hong Kong

Correspondence Address:
Sayan Basu,
Tej Kohli Cornea Institute, LV Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, Telangana
India
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijo.IJO_945_18

Purpose: Limbal ischemia is an important prognostic factor in the management of ocular burns. In this study, we evaluated the reliability of clinically assessing limbal ischemia among ophthalmic professionals. Methods: This study included 111 ophthalmic professionals who were shown 12 diffuse illumination color slit-lamp photographs of eyes with recent chemical injuries. Respondents were asked whether the photos were assessable and if yes, then to indicate the presence, location, and grade of limbal ischemia in each case. The responses were collected using a standard data collection sheet and the inter-observer agreement was calculated. Results: All participants responded to every question. Of the 1,332 responses, images were deemed assessable in 1,222 (91.7%) instances. The overall agreement (Fleiss' kappa) for the presence of limbal ischemia and severity of limbal ischemia was 0.106 and 0.139, respectively (P < 0.012). Among the four groups of observers, practicing cornea specialists displayed significantly (P < 0.003) higher kappa values (0.201–0.203) when compared to residents (0.131–0.185), fellows (0.086–0.127), and optometrists (0.077–0.102). All indicated a poor level of inter-rater consistency. Conclusion: The results indicate that clinical assessment of limbal ischemia is highly subjective and there is lack of reliability even among cornea specialists who regularly manage patients with ocular burns. A non-invasive, standardized, objective, accurate, and reliable modality for ocular surface angiography is desperately needed for proper assessment and prognostication of ocular burns.


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    -  Patel CN
    -  Nikpoor N
    -  Yu M
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