| Topic | Details |
| Catagory | Vision Therapy / Binocular Vision Training Tool |
| Convergence / 3‑Dot Card Purpose | The Convergence 3-Dot Card is used to train and evaluate convergence ability and binocular alignment. Patients focus sequentially on three dots positioned at different distances along the card to stimulate the eyes to converge and maintain single binocular vision. It helps strengthen fusional convergence and eye-teaming skills. |
| Item Weight | Lightweight and portable, designed for easy handheld use during clinical sessions or home-based vision therapy exercises. |
| Target Users | Intended for patients undergoing vision therapy, particularly those with convergence insufficiency, binocular vision instability, or eye coordination difficulties. It is used by optometrists, ophthalmologists, orthoptists, and vision therapists in clinical or supervised home therapy programs. |
| Optotypes | The card uses three simple fixation dots as visual targets. It does not include letters, numbers, or standard optotype symbols, as the purpose is vergence training rather than visual acuity testing. |
| Line Sizes | Not applicable. The Convergence 3-Dot Card does not measure visual acuity or line sizes; it functions as a vergence and binocular alignment training tool. |
| Testing Distance | Designed for very near working distance, typically held close to the patient’s nose to stimulate near-point convergence during therapy exercises. |
| Dimensions | Approximately 5.5 inches (height) × 2.5 inches (width), making it compact and convenient for handheld use in therapy sessions. |
| Mounting / Display | Handheld device used in free space. The patient typically holds the card at the nose and focuses on each dot sequentially while maintaining single binocular vision. |
| Features Included | Double-sided design with red and blue printing. The colored sides allow clinicians to use red/blue anaglyph glasses for fusion training, suppression detection, and binocular coordination exercises. |
| Material | Typically printed on durable coated cardstock or laminated card material, designed for repeated clinical and home therapy use. |
| Usability / Marker of Quality | The Convergence 3-Dot Card features a simple, clinically proven design widely used in vision therapy programs. High-quality versions provide clear target visibility, durable print quality, and compatibility with red/blue fusion exercises, making them effective tools for binocular vision training. |
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