This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
[{'content': 'All the following are true regarding KERATOCONUS except \nSelect and explain. \nA. Munson sign is present, B. Hypermetropia is seen, C. Thinning of central cornea, D. Contact lens used as treatment', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans) b (hypermetropia is seen) Ref: kanski 6th ed p 288-289Keratoconus is a progressive disorder in which cornea assumes a conical shape secondary to thinning and protrusion. Presentation is during puberty with unilateral impairment of vision due to myopia and astigmatism.Signs include:1. oil droplet reflex - on distant direct ophthalmoscopy2. scissoring reflex - in retinoscopy3. vogt lines - fine vertical lines in descemets membrane on slit lamp examination4. Fleischer ring - epithelial iron deposition surroundind the base of the cone5. Munsons sign - bulging of lower lid on down gazeTreatment -Spectacles - to correct mild astigmatismrigid contact lens - for higher degrees of astigmatismKeratoplasty - for advanced cases with corneal scarring.', 'role': 'assistant'}]