Category: Knowledge Center

Aniseikonia is a condition where the image seen by one eye is a different size and shape than the image seen by the other eye.

Sometimes referred to as “lazy eye”, amblyopia is decreased vision in one or both eyes not caused by anatomical damage. Vision therapy often is used to treat amblyopia, since the condition is usually uncorrectable by optical means (e.g. eyeglasses). Related items Correct-Eye Scope The Basic Franzblau Multi Sensory Coordinator Stereo Reader Sherman TV Training Kit...

Vague eye discomfort arising from use of the eyes; may consist of eyestrain, headache, and/or browache. May be related to uncorrected refractive error or poor fusional amplitudes.

Astigmatism is a common condition, often occurring with near-sightedness or far-sightedness, where all of the rays of light entering the eye do not focus on the same plane, resulting in out of focus vision. The cause is unknown. A minor degree of astigmatism is considered normal and does not need correction. Related items Astigmatic Dial...

Barrel cards refer to a kind of target used in vision therapy to help build fusional reserves – the power and ability of both eyes to work together.

The Brock Technique is a comprehensive diagnosis and therapy program for strabismus (“crossed eyes”) that can be implemented at any developmental level where a patient demonstrates fusion (where both eyes work together). Related items Light Box Transparency Viewer Brock Technique Transparency Set The Brock Technique of Strabismus Therapy

A cheiroscope is used in the treatment of strabismus (“lazy eye”). It incorporates a drawing exercise that is conducted at a subjective angle, which reveals if the patient is using the dominant eye to fixate on the image, and thus suppressing the non-dominant (“lazy”) eye. Related items Optional Cheiroscopic Viewer Attachment The Combined Franzblau Multisensory...

Color blindness is an inherited condition most commonly seen in men and with the colors red and green. It is caused by a deficiency of certain “cones”, or color detectors, in the eye. Although there is no cure, this condition does not significantly impact most day to day vision functions. Related items Rapid Screening Tests...

Convergence is the inward movement of eyes toward each other. Related items AN Training Series Delta Base-Out Training Unit Van Orden Graph Training Charts (base in) Van Orden Graph Training Charts (base out)

The Delacato Stereo Reading Program trains an individual to read with both eyes, strengthening figure-ground perception and establishing proper visual-motor function without intra-personal clues. Related items Stereo Reader Delacato Exercise/Reading Cards Delacato Test Summary Sheets