I got different eye prescription during 2 months with ghost vision

[Zr_voda]

Hi, I am a 16 year-old, in last November I went to renew my eye RX. I got prescription number one here: https://i.imgur.com/VF5cgbA.png           after a month I wasn't satisfied at all, I can't stay on computer more than 20 minutes nor a book. I went to another ophthalmologist who gave me number 2 and told me that "High astigmatism lenses are difficult to take accurately" the difference made me worried so I didn't made it, after that I went to another ophthalmologist who gave me number 3, made me a back eye exam and told me it is fine. he asked me to do a pentacam exam and I did (here is it: https://imgur.com/a/44K02) I am now using prescription number 3 having but I am seeing a shadow under text especially that on black backgrounds, when I look at a led monitor I see many shadows make it hard to see. Cant read for an hour. I always get strain in addition to dry eyes.
Have I Keratoconus? (I am worried because I made a pentacam exam in november and gave different numbers, here is it: https://imgur.com/a/Q7rLd )
Can I have keratoconus in future?
What caused that different in my RX? (Note: all my visits were during exams and my eyes was tired with strain and fatigue)
Is there a cure for these symptoms?
Thanks.

[John C Hagan III, MD, FACS, FAAO]

The rules of the MEDHELP.org forbid us to make exact diagnosis especially based on data posted. This also can violate practice regulations where you live and where I live. So you would need to discuss the results of your corneal topography with the ophthalmologist that ordered and did the test.  What you were told about high astigmatism being difficult to treat and get comfortable glasses is true.

[Zr_voda]

Thanks, thats ok, i disscussed with him but he didnt reply when i asked if i could get it in future? Another thing can fatigue cause different eye prescriptions? What caused it please?

[John C Hagan III, MD, FACS, FAAO]

Could you get k-conus. Yes you could.  Different glasses RX is often due to variability of responses by the person having the glasses test (refraction).  It is a subjective test and it is often difficult to tell which is clearer when offered two choices. Fatigue may detract from your abilities as observer.   It is a very very subjective test.

[Zr_voda]

Ok, please, what can I do to save my cornea from K-conus? can eye strain affect my cornea?  from 1 to 10 how serious is it? Many thanks for your response.

[John C Hagan III, MD, FACS, FAAO]

Did any of the doctors you saw tell you you had k conus? If they didn't why are you planning your life around having it? If they did make that diagnosis you need to discuss with them: rigid contact lens or collagen cross-linking using riboflavin.

[Zr_voda]

I also wanted to know if that was irregular astigmatism.

[Zr_voda]

Am i like this one? https://www.medhelp.org/posts/Eye-Care/READ-IF-YOU-HAVE-GHOSTING-VISION/show/1377773



Many thanks