Corneal topography, also known as photokeratoscopy or videokeratography, is a non-invasive medical imaging technique for mapping the surface curvature of the cornea, the outer structure of the eye. Since the cornea is normally responsible for some 70% of the eye’s refractive power, its topography is of critical importance in determining the quality of vision.
The three-dimensional map is therefore a valuable aid to the examining ophthalmologist or optometrist and can assist in the diagnosis and treatment of a number of conditions; in planning refractive surgery such as LASIK and evaluation of its results; or in assessing the fit of contact lenses. A development of keratoscopy, corneal topography extends the measurement range from the four points a few millimeters apart that is offered by keratometry to a grid of thousands of points covering the entire cornea. The procedure is carried out in seconds and is completely painless.
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Digital Retinal Imaging & OCT Scans Near Clifton, VA
We use cutting-edge digital imaging technology to assess your eyes. Many eye diseases, if detected at an early stage, can be treated successfully without total loss of vision. Your retinal Images will be stored electronically. This gives the eye doctor a permanent record of the condition and state of your retina.
This is very important in assisting our optometrist near Chantilly, VA to detect and measure any changes to your retina each time you get your eyes examined, as many eye conditions, such as glaucoma, diabetic retinopathy and macular degeneration are diagnosed by detecting changes over time.
The advantages of digital imaging include:
- Quick, safe, non-invasive and painless
- Provides detailed images of your retina and sub-surface of your eyes
- Provides instant, direct imaging of the form and structure of eye tissue
- Image resolution is extremely high quality
- Uses eye-safe near-infra-red light
- No patient prep required
Digital Retinal Imaging
Digital Retinal Imaging allows your eye doctor to evaluate the health of the back of your eye, the retina. It is critical to confirm the health of the retina, optic nerve and other retinal structures. The digital camera snaps a high-resolution digital picture of your retina. This picture clearly shows the health of your eyes and is used as a baseline to track any changes in your eyes in future eye examinations.
All About Optical Coherence Tomography
Optical Coherence Tomography (OCT) is the latest technological advancement for the early detection and treatment of common eye conditions, including glaucoma, macular degeneration and diabetic retinopathy. The OCT uses light waves to take cross-section pictures and is able to produce high quality images of the retina in a non-invasive, patient friendly manner.
This technology is generally used to investigate, diagnose and monitor glaucoma and macular disease by creating high resolution images of the eye. These scans are then used for analysis and detection of changes that could signal possible ocular problems.
The OCT allows your eye doctor to see distinctive layers of your eye, making mapping and measuring their thickness easier than ever before. These measurements help with early detection, diagnosis and treatment of retinal diseases that otherwise may take longer to detect or may go undetected entirely, minimizing treatment options and success rates. Dr. Kathleen Moore of Centreville Eye Care in Centreville, Virginia explains, “OCT is used to scan the retina and optic nerve at an extremely high resolution, down to a 5 micron digital slice of your eye. That’s 1/10,000,000 of one inch! This allows your doctor to get a view of sections of your eye that are thinner than a human hair.
Another advantage of this method of detection is that OCT technology often includes the ability to save and display images. This allows doctors to compare new images taken at your annual eye exam with those taken in previous years, to more easily detect changes that may signal the onset of certain eye diseases. Patients are also able to see what their doctors are seeing, and if there is a problem, they can actually see it and be involved in their own care.
According to Dr. Moore, “OCT scans are good for all patients, but are particularly useful for those who display early signs of glaucoma or macular disease. The patient experience is very simple, comfortable and convenient. The patient is seated in front of the instrument and instructed to look for targets in his/her field of view. The scan is acquired in only a few seconds, producing a quick and painless, high resolution scan of the entire retina. It is completely non-invasive and does not use a bright light. The end result is a convenient, comfortable patient experience that produces the best readouts and analysis for superior overall eyecare.”
For more information, contact Dr. Moore, today.
Visual Field Testing
A visual field test measures the range of your peripheral or “side” vision to assess whether you have any blind spots (scotomas), peripheral vision loss or visual field abnormalities. It is a straightforward and painless test that does not involve eye drops but does involve the patient’s ability to understand and follow instructions.
An initial visual field screening can be carried out by the optometrist by asking you to keep your gaze fixed on a central object, covering one eye and having you describe what you see at the periphery of your field of view. For a more comprehensive assessment, special equipment might be used to test your visual field. In one such test, you place your chin on a chin rest and look ahead. Lights are flashed on, and you have to press a button whenever you see the light. The lights are bright or dim at different stages of the test. Some of the flashes are purely to check you are concentrating. Each eye is tested separately and the entire test takes 15-45 minutes. These machines can create a computerized map out your visual field to identify if and where you have any deficiencies.
OPTOS Retinal Exam Near Chantilly, VA
Annual eye exams are vital to maintaining your vision and overall health. We at Centreville Eye Care Center offer the optomap® Retinal Exam as an important part of our eye exams. The optomap® Retinal Exam produces an image that is as unique as you fingerprint and provides us with a wide view to look at the health of your retina. The retina is the part of your eye that captures the image of what you are looking at, similar to film in a camera.
Many eye problems can develop without you knowing. You may not even notice any change in your sight. But, diseases such as macular degeneration, glaucoma, retinal tears or detachments, and other health problems such as diabetes and high blood pressure can be seen with a thorough exam of the retina.
An optomap® Retinal Exam provides:
- A scan to show a healthy eye or detect disease.
- A view of the retina, giving your doctor a more detailed view than she can get by other means.
- The opportunity for you to view and discuss the optomap® image of your eye with your doctor at the time of your exam.
- A permanent record for your file, which allows us to view your images each year to look for changes.
The optomap® Retinal Exam is fast, easy, and comfortable for all ages. To have the exam, you simply look into the device one eye at a time and you will see a comfortable flash of light to let you know the image of your retina has been taken. The optomap® image is shown immediately on a computer screen so we can review it with you.