LASIK DALLAS - DR WILLIAM BOOTHE

overcorrection - A complication of PRK where the expected amount of correction is more than desired. See glossary entry "regression". Overcorrection occurs in the occasional person where healing occurs less vigorously than predicted by the laser computer program, and the planned treatment "overcorrection" persists. Overcorrection can also occur in the uncommon event that the laser is improperly calibrated.

DR. WILLIAM A. BOOTHE - LASIK

Buttonhole Flap - A LASIK problem where the microkeratome cuts through the top surface of the cornea while creating the corneal flap, while lifting it, or while folding it back. It can be caused by loss of the suction which holds the microkeratome against the cornea, or inadequate suction, or by poor matching of microkeratome to patient. If possible, the flap is replaced, and no further surgery is attempted for several months, after it has healed. Sometimes it can cause scarring which impairs vision, but usually there are no permanent ill effects.

Cataract - An opaque or cloudy area that forms in the eye’s lens, impeding vision. They tend to occur with aging, but can also be caused by trauma. Cataracts are treated by the lens being removed and an artificial lens implanted. See intraocular lens.

DR BOOTHE - DALLAS LASIK

DR BOOTHE A. - EYE SURGERY: Visual Acuity is simply the clearness of vision or the ability to distinguish details and shapes or objects.

Vitreous Humor is the transparent, colorless mass of gel that lies behind the lens and in front of the retina and fills the center of the eyeball.
Dr William Boothe
DR. WILLIAM A. BOOTHE - LASIK SURGERY
DR BOOTHE - LASIK EYE

Basement Membrane - A microscopically thin layer of tissue below the epithelial cells (surface cells) of the cornea, connecting those cells to the stroma, which is the middle layer of cells in the cornea.

Best Corrected Visual Acuity - A measurement of your best vision, as corrected by your glasses or contact lenses.

Bifocals - The type of glasses we usually call “reading glasses”, where most of the lens corrects your distance vision, and a small area at the lower edge of the lens corrects your close-up vision. They’re used by people with presbyopia. There are also trifocals.

DR BOOTHE A.
DALLAS LASIK - DR BOOTHE: Starbursts - A visual condition where light sources appear blurred with spikes projecting from the center. It can be a complication of refractive surgery and can also occur naturally.

LASIK DALLAS - Dr William Boothe

Legal Blindness - A definition of blindness which enables a person to apply for government disability benefits. It can be either a visual acuity of 20/200 (or worse), with corrective lenses, in the better eye, or tunnel vision in the better eye of 20 degrees in diameter. This level of blindness is severe, but does not necessarily prevent a person from functioning at all.

DR WILLIAM BOOTHE

yag laser - A laser type using an infra red wavelength of 1064 nanometers. The laser material is neodymium Yttrium-Aluminum-Garnet. Yag lasers are used after cataract surgery to photovaporize the residual membrane behind the artificial lens. The commom misconception that "lasers" are used to remove cataracts occurs because c. 75% of post-cataract patients eventually require yag laser capsulotomy.

20/20 - An expression for normal eyesight. The numbers refer to feet (except in countries that use the metric system, where it’s expressed as 6/6, six meters being approximately equal to 20 feet). The first number refers to the distance between the eye chart and the eye being tested. The second number is a comparison of a normal eye and the tested eye. When the second number is 20, that indicates the tested eye can read the small letters on the chart from 20 feet away, as a normal eye can. When the second number is higher than 20, it indicates impaired vision, more impaired as the number is higher. For example, if a person’s vision is assessed at 20/100, it means that this person must be only 20 feet from the chart for it to look as clear as it does to a normal eye 100 feet away.



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