In Majority cases of Progressive keratoconus, Cylindrical power changes and hence change (mostly increase) in the Minus Cylindrical power gives a clue to the treating general ophthalmologist about referral to a corneal specialist. We cornea specialists, rely more on investigation called Corneal Tomography (better than Topography) to accurately predict progression of keratoconus. Tomography can accurately predict progression of keratoconus even before a change in cylindrical power and hence guide us to treat keratoconus without allowing further damage to cornea.