Our Services

Services Offered - Low Vision

Services Offered by Janet S. Sunness, MD
Low Vision Evaluation The low vision evaluation includes a thorough history of visual difficulties, determining if vision can be improved by refraction, measuring visual acuity, contrast sensitivity, visual fields, and reading difficulty, an assessment for the presence of central blind spots in the vision, and an ophthalmological evaluation.  Treatment is then provided, often together with low vision occupational therapy evaluation and treatment by Susan Garber OTR/L.

Retinal Evaluation
Dr. Sunness is an expert in medical retinal disease, including macular degeneration, diabetic retinopathy, retinitis pigmentosa, Stargardt disease, and other hereditary retinal diseases.

Specialized visual function testing and clinical electrophysiology 
Dr. Sunness has done pioneering work in defining the visual difficulties associated with many eye diseases.

Scanning Laser Ophthalmoscope (SLO)and the Nidek Microperimeter (MP-1) allows for the measurement of retinal function and identification of abnormalities in diagnostic imaging of the retina in macular degeneration, diabetic retinopathy, hereditary retinal and macular disease and other retinal disorders.  It helps us in coaching patients to use their remaining vision more effectively.

Visual Field Tests are done to measure your "side" vision, which is important in driving and navigation.

Electroretinography (ERG and multifocal ERG) measures the electricity produced by the retina in response to light flashes.  It is important for diagnosing certain diseases like retinitis pigmentosa, for evaluating for neurodegenerative diseases in early childhood, and for identifying the cause of unexplained vision loss.

Visual evoked response (VER, or VEP) measures how well the signal generated by seeing a pattern gets to the back of the brain.  It is a sensitive measure of optic nerve function.

Electrooculography (EOG) measures the electrical voltage generated when the eye is in a bright versus a dark environment.  This is useful for diagnosing a retinal condition called Best disease.

Dark adaptation testing (SST) measures the smallest amount of light a person can see after being in the dark for 30 minutes or more.

Color vision testing (D15, FM100 Hue) measures how well a person can distinguish different colors, using special testing that is also useful in patients with low vision.  Helps to diagnose various optic nerve and retinal diseases.

Also available in the GBMC Department of Ophthalmology:
Fundus photography documents abnormalities in the retina or optic nerve for future comparison.

Fluorescein angiography allows one to see abnormalities in the retina that lead to leaking of dye from blood vessels or loss of some of the layers of the retina.

Optical Coherence Tomography (OCT)is a noninvasive imaging procedure that provides cross sectional images of the retinal layers and the ability to track changes to macular thickness over time.

Low Vision Occupational Therapy Exam: Susan Garber, OTR/L

Occupational therapy exam will focus on analyzing and evaluating difficult daily living tasks and providing practical solutions to visual, physical and aging challenges. The occupational therapist provides education and training in all the current low vision optical aids.

In- Home Visits

After the initial therapy exam at GBMC it is sometimes deemed beneficial for the client to be seen within his/her own home to allow for proper carry -over of training, assessing safety, lighting and provide home modifications to make living at home a success.

*This service is only offered to clients of Hoover services and some limitations related to distance apply.

CCTV Instruction

Hoover Services has a CCTV (close circuit television sometimes known as reading machines) lab that has the most current technology.   If you are interested in learning more about the CCTV it is recommended you schedule an appointment with Susan.

The VIEW  (Vision - Information - Education - Wellness)

The VIEW is Hoover Service's retail store with newest non-optical aides, such as phones, calendars, low-powered magnifiers and much more.  It also is a showcase for high technology devices, such as video magnifiers.  This store is available to anyone needing to purchase aids.

Greater Baltimore Medical Center | 6701 North Charles Street | Baltimore, MD 21204 | (443) 849-2000 | TTY (800) 735-2258
© 2014  GBMC. This website is for informational purposes only and not intended as medical advice or a substitute for a consultation with a professional healthcare provider.