Menu
Call 877-702-2020 or schedule a FREE consultation
Over 25 Years of Vision Correction Call 1-877-702-20201-(877)-702-2020 or Book Your Appointment below

Glossary

Aberations
An aberration is a visual distortion. Lower order aberrations refers to common refractive errors such as Myopia (Nearsightedness), Hyperopia (Farsightedness) and Astigmatism. Higher order aberrations are more acute visual problems caused by corneal imperfections. 

Astigmatism
A condition in which vision is blurred or distorted because the cornea is misshaped. Astigmatism can be corrected with eyeglasses or contacts. Permanent correction can be achieved through refractive surgery.

Accommodation
The eye’s focal adjustment that allows it to view objects at different distances.

Acuity
Vision acuity refers to sharpness and clarity of vision.

Anterior Chamber
The space between the iris and the cornea

Catalys Laser
A state-of-the-art femtosecond laser specifically designed for laser-assisted cataract surgery. It pulses at the amazing speed of one millionth of a nanosecond 10 -15, allowing the surgeon to operate with an unprecedented degree of accuracy.

Cataract
This gradual clouding of the crystalline lens is a natural part of the aging process.  Other causes of cataracts include trauma or disease.  Common symptoms include cloudy or blurred vision, changes in color perception, sensitivity to bright lights, difficulty seeing at night and a halo effect around lights. Cataracts can be surgically removed

Cornea
The transparent outer layer of the eye, which covers the iris. This is the part of the eye that refracts light and focuses vision.

Dilation
The use of eye drops to temporarily widen the pupil for an eye exam

Dry Eye Syndrome
A common condition that occurs when the eyes don’t produce enough tears to stay moist and comfortable. Symptoms may include stinging, burning and pain, a feeling of scratchiness and occasional blurred vision.

DSEK Corneal Transplant
This procedure involves transplanting only one thin layer of corneal tissue, the endothelial layer.  The remaining healthy layers of corneal tissues are kept intact. In the traditional procedure, the surgeon removes the entire damaged central portion of the patient’s cornea and replaces it with a donor cornea.

Epic-2100  Refraction System
The Epic 2100 integrated digital refraction system is a device used during an eye exam to measure refractive error.

Far-sightedness (Hyperopia)
Difficulty seeing up close. Some, but not all, people with hyperopia may also have a degree of difficulty with distance vision.

FDA
The abbreviation for the Food and Drug Administration, the government agency that evaluates and approves medication and medical devices, such as lasers for eye surgery.

Femtosecond
A quadrillionth of a second.

Femtosecond Laser
An ultra-fast laser used in cataract surgery that allows the surgeon to operate with unprecedented speed and accuracy.

Glaucoma
A thinning of the optic nerve that can be worsened by high pressure in the eye. If not treated properly, glaucoma can lead to blindness.

Intraocular Lens Implant (IOL)
An artificial lens implanted inside the eye to replace or supplement the natural lens during cataract or refractive surgery.

Intacs@ Prescription Inserts
Intacs prescription inserts are an innovative approach to treating keratoconus. Intacs work by flattening the cone-shaped cornea to reduce vision distortions.  In some cases, Intacs can eliminate the need for corneal transplants.

Iris
This is the ring inside the eye that determines your eye color. The Iris is a muscular piece of tissue suspended behind the cornea and immediately in front of the lens. The iris opens and closes to regulate the amount of light entering the eye.

Keratectomy
The surgical removal of the cornea.

Keratotomy
A surgical incision in the cornea.

Keratoconus
A condition in which the central part of the cornea gets progressively thinner, causing the cornea to bulge outward and  become progressively more cone-shaped. This causes moderate to severe astigmatism, visual distortion and blurriness.

Laser
Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. A laser is a divice that produces a powerful beam of light.  Different laser speeds and wavelengths are used for vision correction procedure, refractive surgery and glaucoma treatment.

LASIK
LASIK is a vision-correction procedure that can be used to treat nearsightedness, farsightedness and astigmatism.

Lens
The lens is the part of the eye that focuses light onto the retina. The lens can change shape to allow eye to focus at different distances.

Myopia
Also known as nearsightedness, myopia is a condition which affects your ability to see seeing objects in the distance.

Night blindness
When vision is impaired in dim or darkened conditions, this is known as night blindness.

Ocular
Ocular means of, or relating, to the eye.

Ocular Response Analyzer
One of the tools used to evaluate whether a person is a candidate for LASIK is the Ocular Response Analyzer, which examines the “biomechanical properties” of the cornea. The Ocular Response Analyzer evaluates intraocular pressure as well as the relative strength or weakness of the cornea.

Ophthalmologist
An ophthalmologist is a medical doctor who specializes in the medical and surgical care of the eyes and helps patients maintain good vision. After medical school and a one-year internship in internal medicine, an ophthalmologist completes a three-year ophthalmology residency.

Optician
An optician fits and makes corrective lenses for glasses and contact lenses, based on a prescription written by an ophthalmologist.

Optometrist
 A doctor of optometry is not a medical doctor. Optometrists attend a 4-year optometry school and specialize in methods of correcting optical abnormalities with eyewear and contact lenses. Optometrists can also provide routine screening examinations and diagnose and treat nearsightedness, farsightedness, astigmatism, and presbyopia.

Optometrists do not perform surgery and are not trained to manage all vision and eye problems.

Orbscan Topography
Orbscan topography, or eyemapping, is a diagnostic test that assesses corneal thickness for LASIK surgery evaluation.

Peripheral vision
Peripheral vision is our side vision, what we see on the edges of our direct line of sight.

Posterior Chamber
This is the space, filled with a liquid called aqueous fluid, between the back of the iris and the lens capsule.

Presbyopia
As the lens ages, it loses elasticity and focusing on close-up objects becomes progressively more difficult. Presbyopia is a natural part of the aging process that becomes symptomatic around age 40.

Pupil
The pupil, which looks like a black circle in the middle of the iris, is an adjustable opening that changes size in response to lighting conditions. In dim light, the pupil dilates to let in more light. In bright light, it retracts.

Refraction
Refraction refers to how the eye bends light to focus an image on the retina.

Refractive Errors
Refractive errors are imperfections in the eye’s ability to focus. Hyperopia, myopia, and astigmatism are all refractive errors.

Retina
The retina is a fine layer of sensory tissue that lines back of the eye. It captures light and images, translates them into electrical impulses and sends these to the brain through the optic nerve

Selective Laser Trabeculoplasty ( SLT)
SLT is an innovative and highly effective glaucoma treatment. This advanced procedure uses laser light to stimulate the body’s own healing response. The laser has a special wavelength that affects only pigmented (melanin containing) cells of the eye, leaving most of the trabecular meshwork ™ intact.

TECNIS Symfony lens implant
An upgrade from the traditional monofocal lens implant, the TECNIS Symfony multifocal lens eliminates the needs for corrective eye wear after cataract surgery or as an alternative to glasses and contacts.

Trabecular Meshwork
This is an area of tissue around the base of the cornea. The trabecular meshwork is responsible for draining the aqueous humor from the eye.

Visian ICL
Implanted over the natural lens, this implantable collamer lens is a LASIK alternative for moderately to severely nearsighted people. The Visian lens functions like a permanent contact lens, but because it is implanted inside the eye, it is maintenance-free.

Visual Acuity
This term refers to how well your eye is function and how well you see. Issues with the lens, retina or optic nerve can all impact visual acuity.

Visual Field
The entire area that the eye can see,  including peripheral vision. Particular deficit patterns on a visual field can represent different eye diseases such as glaucoma, optic nerve or brain disorders.

VisuMax
The VisuMax Femtosecond System is used in the first part of the LASIK procedure, to create the corneal flap. With a laser pulse rate of 500kHz, the VisuMax sets new standards in surgical efficiency.

VISX STAR® S4 Laser
A laser that is FDA-approved for astigmatism surgery, as well as for the treatment of both nearsightedness and farsightedness.

Vitreous humor
The colorless, gel-like substance in the center of the eyeball.

Wavefront Mapping
3-D WaveFront Eye mapping detects vision issues by mapping the way light waves travel through the cornea and crystalline lens. Wavefront mapping performs a complete examination of the eye’s focusing systems, locating previously undetected problem areas. Higher order aberration measurements are converted into a WaveFront Eye Map, which is used to customize your eye surgery.

YAG Capsulotomy
The use of a YAG laser to remove the film that sometimes develops over time on the back of an artificial lens after cataract surgery.

  • Patient Discusses ReSTOR results with Dr. Christenbury

    View Video

    Ace & TJ talk about LASIK with Dr. Christenbury

    Channel 96.1 Ace & TJ both have 20/15 vision after LASIK with Dr. Jonathan Christenbury! View Video

  • Paul Schadt talks about son’s LASIK experience with Christenbury Eye Center

    Country Music Hall of Famer and host of 96.9’s Paul Schadt and Meg show talks about his son’s 20/15... View Video

    As Seen on the Discovery Channel

    In View the educational TV series hosted by broadcast icon Larry King, interviewed Jonathan Christenbury, MD of the Christenbury Eye Center... View Video

  • See what our LASIK patients are saying

    LASIK patient Brianna sees 20/20 after Laser Eye Surgery with Dr Christenbury... View Video

    Jason – Visian ICL

    Christenbury Eye Center Visian ICL by Dr Jonathan Christenbury gives client Jason Johnson incredible 20/15 results... View Video

  • Dale – LASIK

    Meet Dale. He had his one month LASIK follow up appointment today and is seeing great! View Video

    Renee – LASIK

    As a business owner, I have struggled with contacts and glasses all of my life. I decided to look into LASIK and contacted Dr. Christenbury’s office... View Video

  • Mark – ReSTOR

    Mark McIntosh had ReSTOR 3 years ago and was able to eliminate his fixed lenses, progressive bifocals, and prescription sunglasses... View Video

  • Patient Discusses ReSTOR results with Dr. Christenbury

    View Video

  • Ace & TJ talk about LASIK with Dr. Christenbury

    Channel 96.1 Ace & TJ both have 20/15 vision after LASIK with Dr. Jonathan Christenbury! View Video

  • Paul Schadt talks about son’s LASIK experience with Christenbury Eye Center

    Country Music Hall of Famer and host of 96.9’s Paul Schadt and Meg show talks about his son’s 20/15... View Video

  • As Seen on the Discovery Channel

    In View the educational TV series hosted by broadcast icon Larry King, interviewed Jonathan Christenbury, MD of the Christenbury Eye Center... View Video

  • See what our LASIK patients are saying

    LASIK patient Brianna sees 20/20 after Laser Eye Surgery with Dr Christenbury... View Video

  • Jason – Visian ICL

    Christenbury Eye Center Visian ICL by Dr Jonathan Christenbury gives client Jason Johnson incredible 20/15 results... View Video

  • Dale – LASIK

    Meet Dale. He had his one month LASIK follow up appointment today and is seeing great! View Video

  • Renee – LASIK

    As a business owner, I have struggled with contacts and glasses all of my life. I decided to look into LASIK and contacted Dr. Christenbury’s office... View Video

  • Mark – ReSTOR

    Mark McIntosh had ReSTOR 3 years ago and was able to eliminate his fixed lenses, progressive bifocals, and prescription sunglasses... View Video