<prompt> KISA is associated with-KeratoconusKeratoglobusHypermetropia with astigmatismTerriens marginal degeneration  <response>: Ans. is a i.e., Keratoconus The KISA index is used in cases of keratoconus and is derived using 4 indices:i Central keratometry Kii Inferior- Superior keratometry I-Siii Astigmatism Index AST It is calculated using videokeratograph device and it quantifies th degree of corneal astigmatism and the SRAX index which is expression of irregular astigmatism occurring in keratoconus. 