diopter - The diopter is the unit of measurement for optical lenses. A one diopter lens will focus parallel light rays 1 meter from the lens and a two diopter lens will focus 0.5 meter from the lens. A plus ( + ) 1.0 diopter lens is convex and will converge the light rays so they focus as a visible image 1 meter past the lens. A minus ( - ) 1.0 diopter lens is concave and will diverge or spread light. The minus lens will not actually focus as a visible image on an optics table. Its image is known as a virtual image and if the divergings rays were followed to their point of origin they would focus 1 meter in front of the minus lens.
Diabetes Type 1 - Insulin-dependent diabetes, also known as juvenile diabetes because it’s often diagnosed in young people. The pancreas, which normally would produce insulin, is unable to do so, so insulin must be injected so the patient can convert sugars and starch into energy. A person with Diabetes, Type 1 or 2, is susceptible to vision problems because the tiny blood vessels in the eyes weaken and start to leak, damaging the retina. See Diabetic Retinopathy.
Dr. William Boothe Lasik Refractive Surgery - A surgery that permanently changes the focusing ability of the eye, done to improve or eliminate refractive errors. It could be either lens surgery such as RLE or P-IOL, or corneal surgery such as LASIK, PRK, Intacs or CK. The lens and the cornea are the two focusing structures in the eye.
Why is it so popular? LASIK has advantages over other procedures, including a relative lack of pain afterward and the fact that good vision is usually achieved by the very next day. Dr. Boothe, an instrument called a microkeratome is used in LASIK eye surgery to create a thin, circular flap in the cornea. Another, newer way of making the flap is with a laser.
Dr Boothe Lasik Surgeon A pioneer in the field of refractive surgery, Dr. William Boothe was one of the first cornea specialists to be trained in vision correction techniques during his Fellowship. In addition, he was the first cornea-trained surgeon in the Dallas area to use an FDA-approved Excimer laser for refractive surgery.
Dr. William Boothe News Dr. Boothe was among the first three surgeons in the Dallas area (and one of the first in the country) to use a microkeratome, the instrument that creates the flap during the initial part of ALK and LASIK surgery. The delicate procedure of precisely lifting the flap is critical to overall success of the surgery.
Dr William Boothe Eye Care The laser is programmed prior to each procedure for the ablative "cut" based on the patient's pre-operative refractive error (nearsightedness, farsightedness, and astigmatism). Once the laser ablation is completed, the surgeon gently replaces the corneal surface flap to restore surface integrity of the eye.
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