The spreadsheet enabled rapid assessment of the difference between two refractive errors. ... Cell R: Expresses Cell Q in degrees (this may be a negative number) =DEGREES(Q1) ...

To compare focometer and autorefractor in the measurement of refractive errors among students in an underserved community of sub-Saharan Africa. The study was a descriptive comparative cross ...

Refractive errors may cause children to squint or frown, blink excessively, or rub their eyes. Parents and caregivers should book an eye exam for the child if they notice these signs.

Please provide your email address to receive an email when new articles are posted on . A new microwave procedure, Keraflex KXL from Avedro, holds the promise of treating keratoconus while also ...