Ophthalmology Notes 100% Correct Review Test

Ophthalmology Notes 100% Correct Review Test What is Astigmatism? - ANS-This is a refractive error of the eye in which there is a different degree of refraction in the different meridians of curvature--> The front surface of the eye is rugby ball shaped as supposed to football shaped What is Presbyopia? - ANS-This is the normal ageing of the lens and it leads to a change in the refractive state of the eye. As the lens ages it becomes less able to alter its curvature and this causes difficulty with near vision, in particular reading How are errors of refraction corrected? - ANS-Glasses or contact lenses (Carry greater risk of infection) What is the function and structure of the lids? - ANS-They afford protection to the eye and distribute the tear film over the front surface of the globe. Excess tears are drained via the punctate and lacrimal system to the nose What is Entropion? - ANS-Lid margin rolls Inwards (EN) , lashes rub on the globe like foreign body and cause irritation What is Ectropion? - ANS-Lid rolls outwards and is not apposed to the globe. Tears can't drain correctly, so the patient complains of watery eyes What is Blepharitis? - ANS-Inflammation of lid margin involves lash and lash follicles. Crusty scaly deposits are seen around the lashes as the meibomian glands Underlying causes can be a staph infection Symptoms: Itchy, burning eyes as tear film is unstable Treatment of Blepharitis? - A...