Myopia: distance blur and minus power
In myopia, distant objects may appear blurred while near tasks are clearer without correction. Light focuses in front of the retina. A minus lens in the spectacle prescription compensates for this pattern.
Laser planning aims to adjust corneal focusing, but higher corrections can require more tissue alteration and may lead to discussion of alternatives.
Hyperopia: plus power and focusing effort
Hyperopia can contribute to near-work strain, headaches or blur, although symptoms vary with age and the amount of error. Plus lenses compensate for the focusing pattern.
The approved treatment range and corneal requirements differ from myopic treatment. An individual examination is essential.
Astigmatism: cylindrical power and distortion
Astigmatism occurs when focusing differs across meridians, often because the cornea is not uniformly curved. It can cause blur, ghosting or distortion at multiple distances and frequently accompanies myopia or hyperopia.
Regular and irregular astigmatism are not interchangeable. A scan suggesting corneal disease may be a reason to avoid laser surgery.
Why the prescription is only the beginning
Two people with the same spectacle number can have very different corneas, tear films and retinal findings. The appropriate procedure range also depends on the specific technology and approved clinical use.
Bring your prescription to the consultation, but expect the recommendation to rely on the complete examination.
Medical information & sources
This page provides general patient education and does not diagnose candidacy or replace an ophthalmologist’s examination. Clinical content requires final treating-doctor approval before launch.