Fundus Photography

Fundus photography (also called fundography[1]) is the creation of a photograph of the interior surface of the eye, including theretina, optic disc, macula, and posterior pole (i.e. the fundus).

Fundus photography is used by optometrists, ophthalmologists, and trained medical professionals for monitoring progression of a disease, diagnosis of a disease (combined with retinal angiography), or in screening programs and epidemiology.

Compared to ophthalmoscopy, fundus photography generally needs a considerably larger instrument, but has the advantage of availing the image to be examined by a specialist at another location and/or time, as well as providing photo documentation for future reference. Modern fundus photographs generally recreate considerably larger areas of the fundus than what can be seen at any one time with handheld ophthalmoscopes.


High contrast retinal imaging

With EasyScan retinal imaging device, retinopathies become more easily detectable. The high contrast retina images are perfect for accurate diagnoses. The benefits of EasyScan’s high contrast images are:

    Earlier diagnosis of retinal conditions such as diabetic retinopathy, age-related macular degeneration and glaucoma
    Greater contrast than a traditional fundus camera
    Better penetration of media opacities such as cataract

The technology: Scanning Laser Ophthalmoscope

EasyScan employs Scanning laser Ophthalmoscope (SLO) technology. The EasyScan’s SLO-technology makes use of an infrared and a green laser that show multiple layers of the retina. When viewed individually and combined, different types of deviations can be identified, serving as a perfect basis for accurate diagnoses.Other benefits of SLO-technology are:

    There is no dilation needed
    The device scans through small pupils (min pupil size 1,5 mm)

With the device’s green laser, any deviations in the upper layers of the retina are revealed, while its infrared laser enables the detection of issues in the pigment epithelium and choroid.

Epic 5100

Dr. Caryn M. West & Associates, PC has led the way in state-of-the-art eyecare for more than 20 years.  Our office was the first in Sumter to implement the Epic 5100 digital refractive system.

The EPIC-5100, from Marco Technologies, is an integrated digital refraction system that exceeds our expectation for consistency and accuracy. This smart technology has the capability of allowing us to make an immediate comparison between your current and new prescription. The process is efficient and the end result is a very precise diagnosis of your vision.

Our job is to optimize your vision and the EPIC-5100 allows us to do just that!

Cirrus OCT

We are eager to announce the delivery of the Optical Coherence Tomography (Cirrus HD-OCT).

What is Cirrus HD-OCT?

Cirrus HD-OCT is the newest high definition retinal OCT system.  This cutting edge diagnostic system acquires many high resolution scans that allow our doctor to get a 3D image of your retina.  The technology is much like ultrasound, except that is uses light rather than sound.  Optical Coherence Tomography is almost like taking biopsies without surgery. The procedure is non-contact and non-invasive.

The Cirrus OCT scans an infrared light across the retina, which generates a cross-sectional image of the tissue in microscopic detail. It generates a measurement of tissue and distance of up to 5/1000 of a millimeter and over 67,000,000 data points. This allows us to view your retina as if it were under a microscope, enhancing our ability to diagnose and manage a wide-range of retinal disorders, including diabetic retinopathy, macular degeneration, ocular histoplasmosis, central serous retinopathy, macular pucker and macular holes.


Our Optometrist is experienced in the management of diabetic eye disease. Our diabetic patients have their retinas routinely photographed.

The most visually disabling consequence of diabetic retinopathy is diabetic macular edema, which is very difficult to detect with conventional means used in routine ophthalmic practice. The Cirrus OCT technology is used to detect the most subtle macular changes in diabetes and hypertension.

We recommend that all patients suffering from diabetic or hypertensive retinopathy undergo Optical Coherence Tomography (OCT) of the macula.

Macular Degeneration

The macula is the tiny area of the retina that is very sensitive to color and detail. For example, we use our macula when we look at the finest print. The rest of the retina is more sensitive to movement and provides us with our night vision.

There are many types of macular degeneration but by far the most common is Age Related Macular Degeneration (AMD). We all get this to some extent as we get older. But of course AMD affects some people earlier in life more than others.

There are two main types of AMD, wet and dry. Wet AMD can be helped if caught early enough. This is one of the reasons why your eye care practitioner advises regular checks after the age of 60 years, usually annually. You should also always seek advice if you see a sudden deterioration in you vision, such as a straight line appearing wavy.

Dry AMD is more difficult to treat but is generally less damaging to sight. It is also more common.

One of the most effective ways to detect subtle macular changes, and differentiate the plethora of different types of macular pathology is by utilizing the new technology of spectral domain optical coherence tomography Cirrus HD-OCT.

We therefore recommend that anyone with early macular degeneration have a regular eye examination including Cirrus OCT. The Cirrus OCT also assists us to differentially diagnose conditions such as macular hole, pseudo-hole, lamellar hole, macular pucker (cellophane maculopathy) and vitreo-retinal traction, to name just a few.

We are often able to help patients with AMD see better with a range of Low Vision Aids. We are also able to offer general advice on diet, vitamin supplementation and general health as it relates to reduce the aging process in the eye. We are happy to dispense home Amsler Grid tests for daily self monitoring to catch Wet AMD at its earliest point.

Humphreys Atlas Corneal Topography

We are leading the way in providing better corneal care in Sumter county by being the only office to offer advanced corneal mapping technology. Using a three- dimensional imaging process and computer digital analysis, we can obtain a topographical map of your cornea much like a topographical land map. 

With this data, Dr. West is able to customize your contact lens fit and provide exceptional follow-up care to assure your continued ocular health. In addition, this instrument is very useful in managing patients with diseased, scarred, or transplanted corneas, such as Keratoconus, a disease that causes thinning and distortions of the corneal surface. 

Also, corneal topography is essential in determining the suitability for Laser Vision Correction and in providing post-operative care. One of the newest uses of this instrument is in managing patients during Vision Shaping Treatment (VST). VST is a non-surgical process using custom designed shaping lenses that are worn during sleep to gently reshape the front surface of the eye (cornea) and reduce near-sightedness. It provides clear vision throughout the day without glasses, contact lenses, or surgery. and


What is the VEP?

Visual evoked potential (VEP) directly measures the electrical activity in the vision system.     When light from an image enters our eye, it is converted into electricity at the retina and travels through the optic nerve and other pathways to the part of our brain that processes vision, the visual cortex.  The VEP will measure the strength of the signal reaching your visual cortex and how fast it gets there.

The VEP technology helps us determine how your eyes communicate with your brain in a way that no other instrument or vision test can.

VEP testing is a painless, non-invasive vision test that objectively measures the function of the entire visual pathway from the eyes to the visual center of the brain. 

VEP has been demonstrated to aid in the diagnosis and treatment of many disorders including amblyopia, brain injury, stroke, glaucoma, multiple sclerosis, and other vision-related issues.  The purpose of this series of tests is to provide comprehensive diagnostic information to better plan your treatment and monitor the results.

Vision disorders are often difficult to diagnose, as many current vision testing instruments used in an eye doctors office do not measure vision beyond the eye.  Also, many standard vision tests require a patient to give a verbal response, but if the patient is an infant or has trouble communicating, these tests may not always provide the doctor with the most accurate information.

By using Visual Evoked Potential technology, we can measure the entire vision system, from the front of the eye to the visual cortex of the brain, without the patient having to say a word.

The Diopsys® NOVA-ERG Vision Testing System is an office-based pattern electroretinography (ERG) module – a part of the Diopsys® NOVA suite of tests. Pattern electroretinography can help doctors gain objective, functional information about the performance of the inner retinal cells of the eye, especially in the macula.

No verbal response or “button pushing” required, providing objective results.

Report contains quantitative information formatted to facilitate physician test interpretation and patient management.

Documents the results of practitioner intervention for tracking patients’ response.

The Diopsys® NOVA-ERG conforms to the standards of the International Society for Clinical Electrophysiology of Vision (ISCEV)

The Diopsys® NOVA Vision Testing System provides your doctor with painless, non-invasive vision tests that utilize electrophysiological technology, including Visual Evoked Potential (VEP) and pattern 

Electroretinography (ERG).

The purpose of these tests is to provide comprehensive information to assist your doctor in better planning your treatment (if needed) and monitoring the results.

Visual Evoked Potential (VEP)

VEP measures the electrical activity in the vision system. When light from an image enters your eye, it is converted into electrical energy at the retina and travels through the optic nerve to the visual cortex of the brain which processes vision. The Diopsys® NOVA-VEP test measures the strength of the signal reaching your visual cortex and how fast it gets there.

The VEP technology in the Diopsys® NOVA device helps determine how your eyes communicate with your brain in a way that no other instrument or vision test can.

How the Test is Done

First the technician will prepare your skin to be clean, dry, and free of any lotions or oils so the sensory pads can be placed on your head. 

After positioning the sensory pads, the technician starts the test. He or she may ask that you cover one eye at a time to record each eye’s response independently. Once the test begins, you will see a series of black and white patterns that appear to “flip” quickly over and over again on a computer screen. It is simply a matter of looking at the pattern for the duration of the test. The computer will capture the information and produce a report for the doctor’s interpretation of the results.

Preparing for your Test

It is best for your hair and face to be clean, dry, and free of any gels, sprays or oils.

Pattern Electroretinography (ERG)

ERG measures the function of your retina – the light-sensitive layer at the back of your eye. When light from an image enters the eye, it is converted into electrical energy by specialized cells in the retina. These cells send electrical impulses through the optic nerve to the brain where the image is processed. The Diopsys® NOVA-ERG test records how well the cells of the retina are conveying electrical impulses within the eye.

ERG results have been demonstrated to aid in the diagnosis and treatment planning of many vision disorders.