###Rationale: Answer- A. KeratoconusThe KISA index is used in cases ofkeratoconus and is derived using 4 indices:Central keratometry KInferior- Superior keratometry (I-S)Astigmatism Index (AST)

###Answer: OPTION A IS CORRECT.
###Question: KISA% is associated with
###Options:
A. Keratoconus
B. Keratoglobus
C. Hypermetropia with astigmatism
D. Terrien's marginal degeneration
