Measurement of Contrast Sensitivity Using the M&S Smart System II Compared with the Standard Pelli–Robson Chart in Patients with Primary Pterygium

Authors

Mohd R. Hilmi, Department of Optometry and Vision Science, Kulliyyah of Allied Health Sciences, International Islamic Universitas Malaysia, Kuantan 25200, Malaysia
Mohd K. Khairidzan, Department of Ophthalmology, Kulliyyah of Medicine, International Islamic Universitas Malaysia, Kuantan 25200, MalaysiaFollow
Zulfaezal C. Azemin, Department of Optometry and Vision Science, Kulliyyah of Allied Health Sciences, International Islamic Universitas Malaysia, Kuantan 25200, Malaysia
Muhammad H. Azami, Department of Mechanical Engineering, Kulliyyah of Engineering, International Islamic University, Kuala Lumpur 50728, Malaysia
Azrin E. Ariffin, Faculty of Optometry and Vision Science, SEGi University, Selangor 47810, Malaysia

Abstract

Background: Contrast sensitivity (CS) is widely used as a measure of visual function in research and clinical settings. CS is regarded as an important visual parameter, detecting subtle reductions in vision prior to significant reduction in visual acuity. Methods: We examined the agreement between the gold-standard Pelli-Robson chart and a computerized test termed the M&S Smart System II (MSSS-II) in patients with primary pterygium. Ninety-three patients (93 primary pterygium eyes) who visited an ophthalmology clinic were selected. The patients were randomly assessed for CS using the MSSS-II or Pelli-Robson chart. The primary outcome was agreement in log units between these two tests in the assessment of CS in patients with primary pterygium. Results: The mean and standard deviation of CS measurement in the two tests were comparable (1.22 ± 0.56 vs. 1.21 ± 0.57 log units, respectively, p = 0.083). The Bland-Altman plot revealed that the mean difference between the two charts was 0.0016 log units (standard deviation: 0.009 log units) with narrow limits of agreement of -0.0186 to 0.0186. Conclusions: MSSS-II provides an alternative for the clinical assessment of CS using a computerized method that describes the status of visual function in patients with primary pterygium.

Recommended Citation

Hilmi MR, Khairidzan MK, Azemin ZC, Azami MH, Ariffin AE. Measurement of Contrast Sensitivity Using the M&S Smart System II Compared with the Standard Pelli–Robson Chart in Patients with Primary Pterygium. Makara J Health Res. 2018;22.