Query Regarding To Astigmatism & KCN.

Doctor, My Age is 14. I Was Diagnosed By Myopic Astigmatism Before 1 Years Ago. Before 1 Years Ago, My Eye Power Was: LE-(CYL: 0.00, MINUS: -1.50) And RE-(CYL: -1.25, MINUS: 0.0). After 1 Years, My Eye Power Is: LE-(CYL: -0.50, MINUS: -1.50) And RE-(CYL: -1.25, MINUS: -0.25). I Can See Clearly With My Glasses And My Vision is 6/6 With Glasses (This is Proved Using Eye-Chart Examination). The Only Problem Which I'm Having is: I'm Having A Little Ghost Image After Wearing Glass. For Example: My Ghost Image Remain 100% Before Wearing Glass. After Wearing Glass, The Ghost Image Reduce 60-80% But Not Fully Gone. Doctor Examined My Eye Before 1 Year And After 1 Year Also Using Slit-Lamp And Autoreftactor But Found Nothing Without Myopic Astigmatism. How Much Possibility I Have That I'm A Patient Of Keratoconus? Please Advice Me, Doctor. I Shall Be Ever Grateful To You.