5 doctors weighed in:
Can you explain why lasik can only work on the eyes up to a certain % of vision loss with astigmatism?
5 doctors weighed in

Dr. Robert Chang
Ophthalmology
2 doctors agree
In brief: Cornea limitation
Depends on the cornea shape, thickness, and how much and where tissue can be removed in order to counterbalance astigmatism.
If too much tissue is removed it can cause problems and ectasia and if the wrong tissue is removed, it can create more refractive error.

In brief: Cornea limitation
Depends on the cornea shape, thickness, and how much and where tissue can be removed in order to counterbalance astigmatism.
If too much tissue is removed it can cause problems and ectasia and if the wrong tissue is removed, it can create more refractive error.
Dr. Robert Chang
Dr. Robert Chang
Thank
Dr. Jay Bradley
Ophthalmology - LASIK Surgery
In brief: LASIK astigmatism
Laser vision can correct the regular astigmatism of the vast majority of patients.
If the astigmatism is irregular in nature, then laser can not be performed.

In brief: LASIK astigmatism
Laser vision can correct the regular astigmatism of the vast majority of patients.
If the astigmatism is irregular in nature, then laser can not be performed.
Dr. Jay Bradley
Dr. Jay Bradley
Thank
Dr. David Kira
Ophthalmology
In brief: Corneal shape
Astigmatism can best be thought of as a spoon or football-shaped cornea.
Lasik reshapes the cornea to make it round and alters the degree of roundness to adjust focus. Lasik accomplishes this by removing corneal tissue and we have to operate within safe parameters leaving enough cornea behind. Astigmatism can present problems with this.

In brief: Corneal shape
Astigmatism can best be thought of as a spoon or football-shaped cornea.
Lasik reshapes the cornea to make it round and alters the degree of roundness to adjust focus. Lasik accomplishes this by removing corneal tissue and we have to operate within safe parameters leaving enough cornea behind. Astigmatism can present problems with this.
Dr. David Kira
Dr. David Kira
Thank
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