Worth Four Dot

Published on
June 20, 2022

A test called the worth four dot is commonly used during a functional vision exam. The purpose of this test is to determine whether both eyes are looking and are active when they are looking at an object in space. A person can sometimes experience double vision or the brain can shut off one eye's vision if it doesn't want you to focus on a specific image, which can happen if you have an eye turn or if the vision in one eye is worse than the other. This test is a way to check if the brain is turning off vision to that eye and seeing what the patient sees.

Worth four dot test: How does it work?

Patients are placed in a dark room and shown the worth four dot device while wearing red and green glasses. An optometrist is going to hold up the worth four dot device. This device consists of four different colored dots. A red dot at the top, two green dots on the sides, and a white dot at the bottom.

Possible outcomes

A red dot and a white dot: If the patient’s left eye didn't work but their right eye did, and they were looking through the red glass, then those green dots would basically disappear, they would turn black, and they would only be able to see the red and a white dot.

Green dots and a white dot: If the patient’s left eye was working and they were looking through the green glass, they would only be able to see green dots on the sides and the white dot at the bottom.

Double vision: If the patient sees five dots, then this means that they have double vision because in reality, there are only four dots.

Four dots: If both eyes are working, then they should see all four dots like we do without glasses. A test like this is very useful for patients who Dr. Wernick suspects are shutting off one of their eyes and they are unaware that their brain is shutting off one of their eyes.

Schedule an eye exam at Amplify EyeCare Manhattan

If you suspect you or a loved one has double vision or binocular vision dysfunction, then a comprehensive eye exam may be in order. Our eye care providers have extensive experience providing functional vision evaluations and vision therapies for special needs, developmental vision, vision after traumatic brain injuries such as strokes and concussions and the complete vision of a patient of any age. Our office can be reached at (212) 752-6930, schedule an appointment today!

Testimonials


  • Dr. Kavner is a gifted diagnostician and orthoptic therapist. He treated me several decades ago for a condition similar to dyslexia. I was having migraines five times per week. I worked with him for about a year and I experienced tremendous improvement (down to 3-4 per year) that has lasted.


    Mary K.

  • Dr. Kavner recommended two types of eye therapy for my daughter. One of them using bio-feedback. In just three sessions she is seeing considerably better. She shouted this morning: Ooh my God! I could not see these letters with my glasses on, and now I can see them without my glasses. If you are willing and able to invest in improving your vision, this is a good place to go to!


    Peter G.

  • Dr. Kavner recommended two types of eye therapy for my daughter. One of them using bio-feedback. In just three sessions she is seeing considerably better. She shouted this morning: Ooh my God! I could not see these letters with my glasses on, and now I can see them without my glasses. If you are willing and able to invest in improving your vision, this is a good place to go to!


    Kinkie F.

  • I have always found Dr Kavner's work, expertise and wisdom of the highest caliber. As one of the fathers of OT, occupational othomology, his depth and breadth of knowledge about the eyes' health and wellbeing of the patient is exemplary. Cannot say enough good things about him.


    Allen B.

  • As a long time patient and grateful recipient of Dr Kavner's care for my whole family I can wholeheartedly tell others his care is exemplary. His knowledge base is thrilling, and how ability to synthesize his wisdom into useful, accessible information is comforting, to say the least. I cannot say enough about this kind, gentle man and his legendary skills - he was one of the fathers of Occupational Optometry.

     


    Alicia C.

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