What Tests May Be Done In The Ophthalmologist’s Office Before The Procedure?
Optical Coherence Tomography (OCT) is a non-invasive imaging technology that can provide very high-resolution images of retinal structures. The anatomic layers within the retina can be differentiated and retinal thickness can be measured. OCT is useful for detecting fluid and retinal changes in patients with wet AMD.
A Visual Acuity Test is used to determine the smallest letters a person can read on a standardized chart. The number of letters gained or lost is a useful measure of the progress of disease or vision improvement with treatment.
Digital Fundus Photography is used to provide an image of the retina that can detect the presence of disease. The photograph of the retina is taken with a special digital camera system that is designed for ophthalmic applications. The pupil is typically dilated to allow the photographs to be taken.
Fluorescein Angiography (FA) is a test that provides an image of the blood vessels in the back of the eye. Dye is injected into a vein in the arm and photos are taken over a period of several minutes. FA may be repeated to evaluate progress of the disease and response to therapy over time.
Axial Length Measurement of the eye is made using ultrasound or a special optical device (laser interferometer), which measures the eye’s features using light. Ultrasound measurements are taken with a probe that is applied to the anesthetized eye, while a laser interferometer involves no eye contact, and is similar to a slit-lamp eye exam.