Pattern reversal chromatic VEPs like onsets, are unaffected by attentional demand.

Attention has been shown to modulate the visual evoked potential (VEP) recorded to reversing achromatic patterns. However, the chromatic onset VEP appears to be robust to attentional shifts. Functional magnetic resonance imaging (fMRI) responses to both chromatic and achromatic reversing patterns are also affected by attention.

Association between diabetes and keratoconus-a systematic review and meta-analysis.

Purpose: To assess the association between diabetes mellitus and keratoconus.

Methods: PubMed, Google Scholar, Web of Science, and Scopus databases were searched for literature on the association between diabetes and keratoconus. The last literature search was conducted on April 4, 2021.

PREVALENCE OF MEIBOMIAN GLAND DYSFUNCTION IN AFRICA: A SYSTEMATIC REVIEW AND META-ANALYSIS OF OBSERVATIONAL STUDIES.

Purpose: To review and summarize information on meibomian gland dysfunction (MGD) epidemiology in Africa.

Methods: A systematic search of online databases was conducted for literature/studies on MGD in Africa. Meta-analysis was conducted to estimate the prevalence of MGD in Africa.