UPM Institutional Repository

Visual status following contact lens related microbial keratitis


Ismail, Lili Asma and Gyanchand Rampal, Lekhraj Rampal and Omar, Nazri and Abdul Rahman, Hejar and Midi, Habshah and Ariffin, Azrin Esmady (2016) Visual status following contact lens related microbial keratitis. Malaysian Journal of Medicine and Health Sciences, 12 (2). pp. 21-27. ISSN 1675-8544


Introduction: A hospital based case control study was conducted in government hospitals on contact lens patients diagnosed with microbial keratitis. Methods: The objective of this study is to determine the visual outcomes of contact lens related microbial keratitis. The visual outcomes which comprised of visual acuity, keratometry readings, corneal topography findings and contrast sensitivity examinations was determined after three months from the first presentation at the hospitals. Results: The mean LogMAR visual acuity during presentation was 0.96 ± 0.73 or a Snellen equivalent 6/60 (n=76) and mean LogMAR visual acuity after three months was 0.10 ± 0.48 or a Snellen equivalent 6/7.5 (n=76) with a significant difference (t=11.22, df=78, p=0.001). Best fit curve for the cases had a regression coefficient, r=0.350 ± 0.063 (95% CI = 0.224, 0.447, df=78, p=0.001. The visual acuity in cases and controls was 0.10 ± 0.48 and -0.10 ± 0.14 respectively (t= -3.61, df=154 p=0.001) after three months which showed improvement. There was a reduction in the corneal uniformity index and corneal asphericity in the cases. The Corneal Uniformity Index (CU index) in cases was 63.03 ± 26.38 (n=76) and in controls, 80.13 ± 11.30 (n=77), (t= -5.22, df=151, p=0.001). There was also a reduction in the contrast sensitivity function at all spatial frequencies in the cases which was significantly different. Conclusion: Microbial keratitis reduced the vision, corneal uniformity index, asphericity and contrast sensitivity after three months in eyes of patients diagnosed with the condition.

Download File


Download (180kB) | Preview

Additional Metadata

Item Type: Article
Divisions: Faculty of Medicine and Health Science
Faculty of Science
Publisher: Faculty of Medicine and Health Sciences, Universiti Putra Malaysia
Keywords: Contact lens; Visual status; Microbial keratitis
Depositing User: Nabilah Mustapa
Date Deposited: 28 Feb 2017 07:25
Last Modified: 28 Feb 2017 07:25
URI: http://psasir.upm.edu.my/id/eprint/50417
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item