Vision Conditions

LASIK Candidate


What is Myopia? (nearsightedness)

Myopia, or nearsightedness, is a condition where the eye is too long and/or the cornea is excessively curved, resulting in too much focusing power.  This means the image falls in front of the retina.  You can see objects up close clearly, but objects in the distance appear blurry.  Laser vision correction surgery is ideally suited to treat myopic patients.

What is Hyperopia? (farsightedness)

Hyperopia, or farsightedness, is a condition where the eye is too short or the cornea is not curved enough, resulting in too little focusing power.  The image is focused behind the retina.  As a result, close objects appear blurry, while objects in the distance are clearer. Laser vision correction surgery is ideally suited to treat hyperopic patients.

What is Presbyopia? (Inability to focus close-up)

Presbyopia is the inability to focus close-up, thus resulting in a loss of reading vision that becomes evident around the age of 45.  Laser vision correction is done differently on each eye.  One eye is treated to view objects at a distance, while the other eye is treated to view objects up close.  The brain puts the two images together and enables the patient to see both distance and close-up objects without effort.  In most cases, the brain is able to compensate, and patients experience excellent functional vision, without needing glasses or contacts.

What is Astigmatism?

Asigmatism occurs when your cornea is shaped like a football, with two different curvatures.  Images appear blurry or ghost-like because light rays are unequally focused.  In extreme cases, images both close-up and in the distance appear blurred.  Many people who have myopia also have astigmatism.  Astigmatism is treated using an oval laser beam, unlike myopia and hyperopia, which use circular beams. Laser vision correction surgery is ideally suited to treat patients with astigmatism.

What is my vision condition?

  • If you wear glasses/contacts for distance vision, you probably have myopia (nearsightedness).
  • If you wear glasses for up-close vision, you most likely have hyperopia (farsightedness) or presbyopia (depending on your age).
  • If you wear reading glasses/contacts to reduce blurry and shadowed vision for up-close and far away, you may have astigmatism.
  •  If you wear bifocal glasses, you likely have presbyopia.
  •  If you have foggy vision, you may have a cataract.

What type of laser vision correction procedure is appropriate for the various eye conditions?

LASIK, custom LASIK with IntraLase, or PRK can be used to treat myopia, hyperopia, astigmatism, or presbyopia.  The laser technique is chosen by the surgeon to match each patient’s unique needs rather than to match a specific eye condition.  For patients with cataracts, NVISION offers cataract surgery. Depending on the severity of the cataracts, these patients can also choose to have laser vision correction surgery if deemed appropriate at the pre-procedure consultation.

Can laser vision correction for presbyopia (inability to focus close-up) last a lifetime?

Laser vision correction for presbyopia treats the effects, not the cause.  With or without laser vision correction surgery, the lens in the eye will steadily become less flexible, and the muscles that pull it into focus will become less powerful.  As presbyopia develops (typically starting at age 45), the ability to adjust vision to various distances continues to decrease, and most noticeably, presbyopia causes close-up objects to appear blurry.  Laser vision correction pushes out the need for reading glasses.

Will the treatment for presbyopia (inability to focus close-up) affect my distance vision?

 The majority of patients who are treated for presbyopia find that their distance vision remains unaffected.

Does the treatment for presbyopia have a similar effect as monovision contacts?

Laser vision correction for presbyopia is similar to using monovision contacts, a practice in which the contacts are fit with one eye for distance vision and one eye for close-up vision. 

What if I have a higher prescription or a combination of conditions?

LASIK can treat patients with higher prescriptions and/or a combination of conditions.  In fact, many patients who have myopia also have astigmatism, both of which are treatable with the laser vision correction procedure.