LASIK DALLAS - Dr William Boothe

Trifocals - (TRI-foh-kul) Corrective eyeglasses with three powers of correction: far distance, near distance, and intermediate distance. Typical reading glasses are bifocals which use most of their surface to correct for far distance, and have a small area at the bottom edge which corrects for near distance (reading). Trifocals also have a middle area which corrects for intermediate distance. Bifocals and trifocals are usually prescribed for people with presbyopia.

DR WILLIAM A. BOOTHE - LASIK

Phakic - An adjective describing an eye which has its natural crystalline lens intact.

Phakic Intraocular Lens (P-IOL) - A removable artificial lens which is placed in front of the natural lens, to increase its focusing ability.

Phoropter - A vision-testing instrument with many lenses, through which a person looks at the eye chart. As the lenses are switched, the person is asked which one gives the clearest images of the letters on the chart. On this basis, a prescription is determined for glasses or contact lenses. The eye chart is set first at 20 feet away, then at 16 inches away, to test both far and near vision.

DALLAS LASIK - Dr William Boothe

DR. BOOTHE: Custom Cornea - The trade name for a wavefront-guided LASIK that uses the LADARVision excimer laser, made by Alcon.

Decentration - A complication of eye surgery. When centration is perfect, the corneal ablation, or the position of the intraocular lens being implanted, is in the center of the eye, lined up with the pupil. Then vision is perfectly centered through the ablated area and pupil, so that we see clearly and fully, like looking through the center of your glasses. When decentration happens, the ablation has been done off-center, or the lens’ position is shifted, so that vision is partially corrected and partially as it was originally.
DR BOOTHE A.
LASIK EYE - Dr William Boothe
DR. WILLIAM BOOTHE - EYE SURGERY

LASIK is the acronym for laser assisted in situ keratomileusis which refers to creating a flap in the cornea with a microkeratome and using a laser to reshape the underlying cornea.

Lens is a part of the eye that provides some focusing power. The lens is able to change shape allowing the eye to focus at different distances.

Microkeratome is a surgical device that is affixed to the eye by use of a vacuum ring. When secured, a very sharp blade shaves a small amount of the cornea at a predetermined depth.

DR WILLIAM A. BOOTHE
DR. BOOTHE A.: Corneal Abrasion - A scrape or scratch on the cornea, the front surface of the eye.
Corneal Ectasia - A complication of LASIK similar to the inherited condition of keratoconus. It can happen when the eye was over-treated by a LASIK procedure, so that not enough thickness is left in the cornea to contain the eye's internal pressure. That pressure pushes against the cornea and causes it to bulge outward. Vision then becomes progressively worse.

DR WILLIAM BOOTHE

Fovea - The central area of the macula, which is the most sensitive area of the retina. The fovea is less than one percent of the retina, but uses over 50% of the visual cortex in the brain (that part of the brain which receives visual information). The fovea is highly sensitive to details of vision but not to dim light, which is why we can see dim objects, such as distant stars, better by not looking at them directly.

DR WILLIAM BOOTHE - EYE SURGERY

After a thorough eye examination, you'll be expected to choose a doctor to perform the LASIK eye surgery. Once this has been done, you'll be scheduled for a consultation with the doctor to discuss the process, and you'll have the opportunity to voice whatever questions or concerns that you may have prior to the procedure.
Alcon LADARVision 4000 and CustomCornea Alcon Surgical's LADARVision excimer laser system with LADARTracker tracks the eye at a rate of 4,000 times per second - tracking the fastest eye movements with 4x safety margin. Only LADARVision has expanded FDA claims for improved accuracy in corneal shaping.



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