The human eye is the organ that gives us the sense of sight, allowing us to learn more about the surrounding world than any of the other five senses. We use our eyes in almost everything we do, whether reading, working,watching television, writing a letter, driving a car, and countless other activities. Sight is the most precious of the five senses.

The eye allows us to see and interpret the shapes, colors, and dimensions of objects in the world by processing the light they reflect or give off. The eye is able to see in dim light or bright light, but it cannot see objects when light is absent. The eye changes light rays into electrical signals then sends them to the brain, which interprets these electrical signals as visual images.

The eye is set in a protective cone-shaped cavity in the skull called the orbit or socket and measures approximately one inch in diameter. The orbit is surrounded by layers of soft, fatty tissue which protect the eye and enable it to turn easily. Six muscles regulate the motion of the eye. Among the more important parts of the human eye are the iris, cornea, lens, retina, and the optic nerve.

The Cornea
The cornea is sometimes referred to as the”window of the eye.” It provides most of the focusing power when light enters your eye. The cornea is composed of 5 layers of tissue, and is 550 microns thick on average, which is one half of a millimeter. The outer layer (the epithelium) is the eye’s protective layer. Most of the inner layers provide strength to the eye. The back layer, called endothelium, keeps the cornea clear by pumping excess fluid out.

When the curvature of the cornea or”steepness” does not match the length of the eye, light rays do not focus clearly on the retina, and glasses or contact lenses are required to correct nearsightedness or farsightedness. The cornea is ideally shaped like the surface of a basketball, but if it is shaped more like a football, this creates astigmatism, which also requires correction with glasses or contact lenses, and is routinely corrected in the LASIK procedure.

The lens is the clear structure located behind the pupil. Its primary function is to provide fine-tuning for focusing and reading. The lens performs this function by altering its shape. At about the age of 40-50, the ciliary muscle inside the eye loses the ability to focus. We are developing a procedure to restore the muscle function and reduce the need for reading glasses. This procedure is completely different from LASIK.
The pupil is the ‘black circle’ that you see in people’s eyes. The primary function of the pupil is to control the amount of light entering the eye. When you are in a bright environment, the pupil becomes smaller to allow less light through. When it is dark, the pupil expands to allow more light to reach the back of the eye. Images are always crisper and sharper in bright light and many people see halos or starbursts at night when wearing glasses or contact lenses.
This is the colored part you see in people’s eyes (i.e. blue/green/brown/hazel). The primary function of the iris is to control the size of the pupil. This is achieved through contraction or expansion of the muscles of the iris.
Vitreous Body
This is the clear”gel like” substance located inside the eye’s cavity. Its purpose is to provide a spherical shape to the eye. The vitreous may develop small clumps known as ‘floaters’, which are more common in nearsighted people than in the rest of the population.
Optic Nerve
The optic nerve carries images from the retina to the brain.
The retina consists of fine nerve tissue which lines the inside wall of the eyes and acts like the film in a camera. Its primary function is to transmit images to the brain.
This is the white tissue that forms the outer wall of the eye. The sclera’s purpose is to provide structure, strength and protection to the eye, except in the front where clear cornea tissue takes its place, allowing us to see.

Custom LASIK

Theres a new wave in LASIK/PRK. The Food and Drug Administration approved a new technology that will change how we view your vision problems. Its called custom LASIK/PRK: the laser eye treatment is based upon the very unique visual characteristics of you eye. Up until now, with glasses, contacts and covential LASIK surgery, correction were quite similar for each type of prescription myopia, hyperopia and astigmatism.

Custom LASIK/PRK involves measuring the eye from front to back, using whats called wavefront technology, to create dimensional (3-D) corneal map. The information contained in the map guides the laser in customizing the treatment to your individual visual irregularities. Prior to the advent of wavefront technology no two people with the same prescription would receive the same glasses, contacts or LASIK procedure.

Potential Benefits of Custom LASIK/PRK

Wavefront technology is groundbreaking because it has the potential to improve not only how much you can see, visual acuity measured by the standard 20/20 eye chart, but also how well you can see, in terms of contrast sensitivity and fine details. This translates into a reduced rish of post-LASIK/PRK complications, such as glare, halos and difficulty with night vision.

Custom LASIKS/PRKS Advantage Lies in the Area of Quality Vision

  • Greater chance of achieving 20/20 vision
  • Greater chance of achieving better than 20/20 vision
  • Reduced chance of losing best corrected vision
  • Reduced chance of losing visual quality or contrast sensitivity
  • Reduced chance of night-vision disturbances and glare
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