-One-choice question 1.Cornealtransparency dependson:B A.zonula occludents in endothelium B.metabolic pump in endothelium C.calcium free fluid in irrigatingsolution D.bicarbonate free fluid in irrigatingsolution 2.Cornealulcer:B A.Corneal ulcer due to Moraxella Liquefaciens usually give rise to serve hypopyon B.Greenish exudate or hypopyon is a pathogno-monic feature of Pseudomonas infection C.Pneumococal corneal ulcer usually spread from central to periphery D.Hypopyon is sterile in fungal corneal ulcer with intact Descement membrane 3.Presbyopia: A A.due to decrease in cilary body tone B.dueto weak zonules C.absent inaphakia D.wearing+2Dhas workingdistance of 75cm 一． One-choice question 1. Corneal transparency depends on: B A. zonula occludents in endothelium B. metabolic pump in endothelium C. calcium free fluid in irrigating solution D. bicarbonate free fluid in irrigating solution 2. Corneal ulcer: B A. Corneal ulcer due to Moraxella Liquefaciens usually give rise to serve hypopyon B. Greenish exudate or hypopyon is a pathogno-monic feature of Pseudomonas infection C. Pneumococal corneal ulcer usually spread from central to periphery D. Hypopyon is sterile in fungal corneal ulcer with intact Descement membrane 3. Presbyopia: A A. due to decrease in cilary body tone B. due to weak zonules C. absent in aphakia D. wearing+2D has working distance of 75cm