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Home » Eye Care Services » Comprehensive Eye Exams » Technology – Advanced Eye Care

Technology – Advanced Eye Care

We use the most up-to-date technology to ensure the best eye care possible. Here are some of the different types of tests and equipment you may experience on a visit to Vision On Park.

phoropter view from the side, high tech eye exam

Corneal Mapping

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.

Special thanks to the EyeGlass Guide, for informational material that aided in the creation of this website.

Digital Retinal Imaging & OCT Scans

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 Midtown Manhattan optometrist 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 allows our Midtown Manhattan 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.

OCT – Optical Coherence Tomography

Optical Coherence Tomography (OCT) is a scanning technique that allows an optometrist to look deeper into the patients’ eyes that would be possible during a regular eye exam, for the purpose of diagnosing eye diseases. Although many optometric practices do not yet provide OCT,  Vision On Park is proud to offer the latest technology in eye care.

The Cirrus HD-OCT

Eye doctor, Optical Coherence Tomography in New York, NYZeiss, world-renowned for its cutting edge lens technology, produces this high definition 3 dimensional scanner. With fast-acting retinal tracking, precise macular thickness analyses, and detailed layer maps, this advanced OCT scanner allows us to pick up early warning signs of developing macular degeneration, and monitor confirmed cases for progression, allowing earlier intervention which is associated with better vision loss prevention.

The Cirrus HD-OCT scanner at our vision clinic comes equipped with powerful applications that assess structural details for symptoms of glaucoma, even before symptoms develop. Using an OCT scanner, glaucoma can be detected up to six years earlier than it might otherwise be picked up, based on the quality of the nerve fiber layer. Detecting glaucoma early offers our patients the greatest opportunity to begin treatment early and prevent low vision associated with glaucoma.

Serving New York, our optometrists are able to retain a digital baseline of your eye exam results. Dr. Carl Zeiss HD-OCT integrates precise, automatic visit-to-visit registration, so we can visualize and measure changes over time.

You may be thinking: Great new tool, Dr. Rana, but...

Does it hurt?

OCT scanning is non-invasive: it doesn’t even touch the eye, and the results are instantaneous. You just look into the eyepiece, and the OCT produces a 3D image of the layers of the retina. The way a dental x-ray yields an image of the root of the tooth, OCT helps to visualize the retina, which can be compared to the root of the eye. Changes to the sensitive tissue of the retina can indicate the development of serious eye diseases and conditions. Treating them early can save eyesight. That’s why our eye doctor offers this advanced diagnostic technology at our New York eye care clinic.

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.


HRT (Heidelberg Retina Tomograph) is an advanced imaging method used to evaluate the optic nerve for early glaucoma.

Fundus Camera

A fundus, or retinal camera, is a specialized microscope with an attached camera designed to photograph the central retina, optic disc, and macula. The resulting photograph is a high resolution magnified image which can help to assess for eye conditions including glaucoma, diabetic retinopathy, macular degeneration, optic nerve disease, and many others. This picture also gives us a baseline to compare the state of your eye health in the future.


Computerized Corneal Topography gives an accurate mapping of the corneal curvature. It is a computerized Video-Keratometer, that maps the surface of your cornea. What this map reveals is the topography or shape of the corneal surface. The Corneal Topography assist in contact lens fitting, refractive surgery, orthokeratology and general assessment of the cornea. Corneal maps can also detect changes in corneal shape from office visit to office visit, which is extremely helpful in keratoconus. Maps can even be sent over the Internet to contact lens manufacturers who are customizing lenses, or to other doctors for second opinions. It supports many important optometric applications, including contact lens fitting, pathology detection, and management.