Visual Field
A visual field test measures your entire scope of vision—central and peripheral—while you stare at a fixed point. A normal fi eld extends approximately 100° temporally, 60° nasally, 60° superiorly, and 70° inferiorly. It is used to detect blind spots caused by conditions like glaucoma, strokes, or brain tumors. There are different types of visual fi elds depending on what your provider is looking for.
OCT
Optical Coherence Tomography (OCT) is a non-invasive, high-resolution imaging test that uses light waves to map and measure retinal layers and the optic nerve. Similar to an ultrasound but using light, it provides detailed 3D cross-sections to diagnose macular degeneration, glaucoma, and diabetes-related eye conditions.
Autorefraction
Autorefraction is a quick, automated eye exam that uses a machine to objectively measure refractive errors (myopia, hyperopia, astigmatism) by shining light into the eye and analyzing the reflection. It provides a fast, objective starting point for prescription lenses—often in seconds—by having the patient fixate on an internal image. This is the baseline for a patient’s refraction with the optometrist.
Corneal Hysteresis
Corneal hysteresis (CH) is a measure of the cornea’s viscoelastic ability to absorb and dissipate energy, reflecting its structural integrity and biomechanical properties rather than just thickness.
Tonometry
Tonometry is a diagnostic eye test that measures intraocular pressure (IOP) to screen for and monitor glaucoma. It assesses the fluid pressure inside the eye.
Clarus
High-resolution, ultra-widefield retinal imaging system used by eye care professionals to capture detailed “true color” images of the retina. Unlike traditional fundus cameras that only see the center of the eye, CLARUS can capture up to 200 degrees of the retina in a single montage, helping doctors detect early signs of disease in the far periphery
Adapt
Dark adaptation tests measure how quickly eyes adjust from bright light to darkness to assess retina health, specifically for detecting early age-related macular degeneration (AMD). In a dark room the test bleaches eye photoreceptors with bright light, then measures the time required for rods to regain sensitivity.
RETeval
The RETeval is a handheld device used by eye care professionals to perform electroretinography (ERG). It measures the electrical response of retinal cells to light to assess eye health. RETeval can often detect functional changes in the eye before structural damage is visible on traditional scans like OCT or fundus photography.
