Correlation Between Contrast Variability and Refractive Error
Journal Title: Journal of Ophthalmology and Advance Research - Year 2023, Vol 4, Issue 1
Abstract
Background: Contrast sensitivity, is defined as the ability to detect the lowest lumination difference between an object and the background. It is one of the main requisites for good quality vision as the eye works by perceiving an object by comparing the difference between the target and the background contrast difference. Aims and Objectives: To assess patterns of contrast sensitivity functions in patients in different types of refractive errors using Pelli Robson chart and also to measure the severity of refractive error within each group and compared the contrast sensitivity function with severity in different types of refractive errors. Material and Method: This cross-sectional study was conducted on 500 patients (Age range from 10 to 80 years) who presented with chief complaint of refractive errors mainly myopia and hypermetropia. Patients who had previous history of ocular surgery and other ocular co- morbidity were excluded from study. Selected patients were enrolled for the study after taking a written informed consent. The patterns of contrast sensitivity function in different types of refractive errors were recorded on a prescribed proforma with respect to: Visual acuity, type of refractive error, severity of refractive error, duration of refractive error, age of the patient, fundus examination and Contrast sensitivity. Statistical analysis was undertaken with P<0.05 significant. Results: A mild decrease in contrast sensitivity was recorded in majority of patients i.e 250 patients (50%). Maximum decrease in contrast sensitivity was seen in 31-60 years age group. A statistically significant direct correlation (P<0.05) was observed between duration and variation in contrast sensitivity. Both the refractive error showed definite decrease in contrast sensitivity and compound astigmatism showed severe decrease in contrast sensitivity. Conclusion: Despite having BCVA of 6/6, patients showed reduced contrast sensitivity, even without any retinal pathology, making it an essential part of a routine ophthalmic examination.
Authors and Affiliations
Shreya Thatte, Haritima Sharma, Shruti Patidar
Temporal Artery Biopsy Roulette: Playing to Win
Giant Cell Arteritis (GCA) is an auto inflammatory response often found in the superficial temporal artery. Patients may present with a localized headache overlying the temporal artery, as well as other symptoms such a...
Etiological Factors Contributing to Red Eye in Basrah: A Clinical Study
Background: Redness of the Eye (RE) results from alterations in the ocular blood vessels, specifically the dilation of conjunctival vessels, sclera or surrounding scleral structures, attributable to trauma, chemical burn...
The Influence of Angles Kappa and Alpha and Pupil Size on Vision after Implantation of Soleko Evolve and Lucidis Lenses with a “Pure” EDOF Structure
Background: Two models of artificial intraocular lenses with a “pure” EDOF structure, i.e. Soleco Evolve and Lucidis, were used in 36 patients in 43 eyes. Results of postoperative visual function were analysed, like al...
Long‐Lasting Stabilization and Improvement of Dry Age‐Related Macular Degeneration by a High Oral Taurine Dose
Purpose: To examine the therapeutic potential of the amino acid taurine in the non‐ neovascular or ∙dry” form of Age‐Related Macular Degeneration (AMD), one of the main causes of vision loss in the elderly, which still l...
Macular Anatomy and Abnormalities in Neurofibromatosis Type 2
Purpose: To describe macular anatomy and abnormalities on Spectral-Domain Optical Coherence Tomography (SD-OCT) in a large series of patients with Neurofibromatosis Type 2 (NF2). Methods: Retrospective review of all c...