How does ophthalmic photography work?
Ophthalmic photography uses specialized equipment to illuminate and make an image of specific structures in the eye.
What are the most common types of ophthalmic photography?
Also called a fundus camera, a retinal camera allows detailed imaging of the back of the eye. Using fine-grained color slide film, a trained photographer can consistently produce detailed photographs in a short time with minimal patient discomfort.
A type of fundus photography in which a fluorescent, mineral-based dye, fluorescein sodium, is injected into the patient's arm, and a series of photographs is captured as the dye moves through the blood vessels in the eye. Eye doctors then diagnose the patient's state of eye disease based on particular fluorescence patterns in the photographs.
A fluorescein angiogram is a valuable tool for assessing blood flow in the eye. It is well tolerated by patients of all ages, but it is an invasive procedure with some side effects. The dye turns the patient's urine bright yellow for several hours, and patients with light complexions may look a little jaundiced for a few hours.
Optical Coherence Tomography (OCT)
OCT is a newer technology that has taken the world of eye care by storm. Using low-powered lasers, the OCT makes a cross-sectional picture of the retina. Behind this simple statement is a revolutionary imaging method. Until OCT arrived, eye doctors determined the state of retinal disease based strictly on their exam and on fluorescein angiography.
Slit lamp photography
A slit lamp bio-microscope is the primary examination instrument for the front of the eye: the cornea, lens, conjunctiva (whites of the eye), and the iris. Every eye exam room has one. An eye doctor or ophthalmic technician use a slit lamp to check the overall health of the eye.
A slit lamp camera is a slit lamp equipped with a camera and a flash light source. Slit lamp photography is done to document disease-related changes to these structures.
A slit lamp allows the examiner or photographer to move the light from side to side, to change the size and shape of the light beam, and to change magnification, all in the interest of revealing small structures as clearly as possible.
For a referral to a Sinai-Grace ophthalmologist or optometrist, call 313-966-4800.