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Farnsworth Test for Congenital and Acquired color defects. The Farnsworth D-15 contains a reference disc holding notation 10 B 5 4 and fifteen numbered discs which make up an incomplete color circle. The patient arranges the discs and then evaluation of the patients arrangement separates 'normal' color perception from moderate and strong defects in deutan, protan or tritan axis color discrimination. The disks are spread out on a table and arranged by the patient. The Farnsworth D-15 test is a subset of the well known Farnsworth 100 Hue Test. It is intended for classification instead of in-depth study of color vision defects. The D-15 and 100 hue tests are correlated. Growing Importance of Color deficiency Screening: In addition to congenital color deficiency screening there is growing evidence that adult acquired color deficiency, especially in yellow and blue perception, can indicate medical toxicity and other problems. Increasingly complex security and medical systems also require verification of all three types of color receptors. How the D-15 test works: The Farnsworth D15 is called 'dichotomous' because it is designed to separate subjects into one of two groups, 1) Strongly color deficient or 2) Mildly color deficient or color normal. This is accomplished by the arrangement of vivid (saturated) colored discs. A perfect score shows normal color perception. A non-perfect score is used to determine a medium or strong color deficiency. -
Features both upper and lower case letters to test near visual acuity in low vision patients. Appropriate starting high plus add power or magnifier power is indicated to the right of the line of copy the patient is able to read. -
Bernell Red/Green Random Dot Variable Tranaglyph Square, Circle and Triangle Targets Now you can train using high levels of binocular skills. This slide can allow those with high amounts of esophoria or exophoira to experience random dot 3-D pictures for the first time. Use with our R/G flipper and get even more flexibility in training. (*Pictured with Sided Holder, not included) -
7-1/2" x 5-1/2" Non-Variable Polarized vectograms ensure testing and training at actual distances. Vectograms stabalize fusion and steropsis, eliminate suppression and develop simultaneous vision. Used in monocular, binocular, pursuit and saccdic training, vectograms help correct and prevent anomalies involving projection and hand-eye coordination. Ideal for use with Bernells Dual Polachrome™ Trainer -
This test can be used with infants, children and adults with low cognitive abilities when communication difficulties prohibit the use of optotype tests to measure visual acuity. This test measures an individual's ability to detect the presence of parallel lines of decreasing width to provide information about the function of some parts of visual pathways. Item #: GF1300 -
The BASS-PL series is a highly sensitive measure of the relationship between Binocular alignment (fixation disparity) and Accommodative function (clarity) during a Series (stamina) of cognitively loaded Saccadic eye movement. This series is designed to be a more dynamic measure of binocular/accommodative function during a saccadic eye movement task by involving a sequence of saccadic indentification targets at two acuity levels; 20/100 & 20/63. Complete system includes: therapy binder and pen, pair of polarized viewers, instruction manual, set of 20/100 target and vectographs and a set of 20/63 target and vectographs. Item #: BASSPL+ -
Made of the finest quality black felt. Attached one meter ribbon and occluder establishes the test distance. No need for headrest or chinrest. Double hanging rod model insures flatness. Approximate Size: 49" x 52" Includes: Recording Charts, Wand, and Eight Velcro Dot Targets *Note: Tangent Screen image is a simulated design. Product has black stitching that matches the design of the white target shown. It is up to the practitioner to make their own design. Item #: BC400+ -
Upgrade your vision therapy to a whole new level with the Stereo Vision Chart Series. Patients love stereo targets, but often we cannot send them home...until now! With the Stereo Vision Chart Series, you have access to economical and efficient training tools to integrate binocular vision training while training other visual skills simultaneously. The Stereo Vision Charts provide an excellent fusion lock and a wonderful depth of field. The depth is subtle and great for working with just noticeable differences (JNDs). They are great for working with pilots, athletes and others who want to refine their depth perception awareness. -
Adult LEA NUMBERS® chart for ETDRS Illuminated light boxes. Fits all existing ETDRS cabinets including both the ESV3000 and ESC2000. LEA NUMBERS® ETDRS chart contains optotypes in proportionally spaced (logMAR) lines; lines range from 20/200 to 20/8 (6/60 to 6/2.4) equivalent, 0.10 to 2.50. Fits in ESV3000 ETDRS illuminated cabinet. -
The new clear fixation paddle is 12" x 12" made of clear polycarbonate. Uses targets with cling material which adheres and removes easily from the front or back of the paddles by adhesion forces.
+65 6514 0848|info@ophthalmic.com.sg
