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These lightweight Red and Blue Glasses are for orthoptic training and vision therapy. The Modern styling makes for a comfortable and easy fit.
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| Topic | Discription |
| Purpose / Use-Case | Purpose : The glasses are used in vision therapy to present different visual stimuli to each eye (via the red and blue lenses) to work on binocular vision, fusion, anti-suppression training, stereo-acuity development, amblyopia treatment and convergence/fusional training. For example, the system CureSight uses red/blue glasses in its home binocular treatment for children Target Users : Children (pediatric patients) undergoing binocular vision therapy (for amblyopia, strabismus, suppression) Children with convergence insufficiency or deficiency of binocular coordination Kids participating in therapeutic exercises using anaglyph charts or dichoptic training Younger children (e.g., preschool-age) require smaller frames; older children may use slightly larger pediatric or “youth” size framesCover the dominant/good eye to force the weaker (amblyopic) eye to work; for patients with Amblyopia (“lazy eye”), suppression, strabismus, anisometropia etc |
| Optotypes / Symbols | Since the glasses are filters rather than the chart itself, the optotypes or symbols are those shown on the therapy chart or digital display. The red/blue (anaglyph) glasses enable one eye to see the red-filtered stimuli and the other eye to see the blue-filtered stimuli. For pediatric use, common symbols might include: simple shapes (circles, squares, smiley faces), cartoon characters, simplified letters or pictures appropriate for children. The key is that one eye sees one set of stimuli (through red lens) and the other eye sees another (through blue lens), and the brain has to combine them (fusion training) or each eye works separately (suppression relief). For example, as discussed for red/green glasses, the red lens blocks what’s on a green overlay and vice versa—this concept is similar for red/blue. |
| Scaling / Spacing | This essentially refers to how the therapy charts or digital tasks are laid out: size of symbols, spacing between them, distance to the child, etc. For pediatric therapy: the spacing between stimuli may be larger (to account for poorer acuity or less fine motor control) and symbols may be larger/fewer per line. The glasses themselves don’t set the scaling/spacing—they must be compatible with the chart/task design so that each eye perceives its part clearly and the fusion task is appropriate for the child’s developmental level. |
| Range of Acuity / Line Sizes | Again, strictly speaking the glasses don’t have acuity or line size parameters; those apply to the optotype charts. However, from a pediatric therapy point of view: you’d expect tasks starting at coarse acuity (e.g., large symbols that a child can easily see) and progressively move to smaller symbols/line sizes as the child improves. The glasses must have good optical quality so that even the smaller line sizes are not compromised by filter distortion or lens blur. The glasses must permit clear vision of symbols appropriate for the child’s corrective prescription (if any) plus the red/blue filter overlay. |
| Testing Distance | Testing Distance Pediatric vision therapy may occur at near (e.g., ~30‐40 cm) or intermediate distance (e.g., ~1 m) rather than standard adult 3 m or 6 m vision charts. For anaglyph/dichoptic training, many tasks are done at near or medium distance so children can interact with them (manipulatives, digital screen, tablet). The glasses should allow comfortable vision at that distance—so lens design has to account for near use (no significant distortion, comfortable frame fit for lower viewing distance). |
| Physical Size & Dimensions | Pediatric version should be smaller than adult frames. For example: one product mentions a “small size (13 cm frame width) – fits children up to 5 years old” for red/green glasses. Typical pediatric frame dimensions might be: Frame width (temple to temple) ~120-135 mm (12.0-13.5 cm) Lens height maybe ~30-40 mm, lens width ~40-50 mm depending on design Temple length (arm) shorter than adult, curved or flexible for comfort The reversible nature: some models allow switching which eye gets red vs blue lens, so temples might be symmetric and the frame designed to be worn either orientation. |
| Mounting / Display Features | Reversible design: The frame is constructed so you can wear it with red lens on right eye or flip it (or swap lens sides) with red on left eye, depending on therapeutic protocol. The filters (red/blue) must be well centred and sealed to avoid crosstalk (i.e., red filter leaking blue stimuli or vice versa). The mounting must be robust (kids move around) and comfortable (lightweight, no heavy metal parts pressing on nose). It should fit over the child’s corrective lenses if they are wearing glasses (or clip-over frames). Some pediatric versions may have adjustable nose pads, flexible temples, or elastic strap for younger kids. |
| Included Accessories / Extras | Typical accessories might include: A protective pouch or case to store the glasses (important for kids) Cleaning cloth Instruction sheet (for therapists/parents) explaining proper orientation (which eye red vs blue) In some vision therapy kits, the glasses come as part of a larger set (charts, cards, digital tasks) so the extras may include a strap, multiple interchangeable lenses, etc. One catalog entry mentions “storage case included” for a “Reversible Red/Blue Anaglyph Glasses” product. |
| Durability / Material Qualities | For pediatric use the glasses must be durable (children are rougher with equipment) and safe (no sharp edges, no small detachable parts that could be swallowed). Materials: Lightweight plastic (polycarbonate or acrylic) lenses with filter coatings, shatter-resistant; frame preferably flexible or spring-hinged so it can bend somewhat without break. Metal spring-loaded temples are mentioned in one catalogue. akriti.org Filters: The red and blue filter lenses must be optically correct (minimal blur, minimal distortion, correct spectral filtering so that the red lens largely blocks blue/green and passes red; blue lens blocks red and passes blue, depending on the therapy design). The reversible design means filters must maintain correct orientation after repeated use. The glasses should resist scratching, should be easy to clean, and maintain their optical filtering over repeated sessions. |
| Usability / Marker of Quality | Usability: Comfortable fit for the child (no slipping, temples not too tight) Clear instructions for which eye gets which lens (red vs blue) Good optical clarity through lenses so that therapy tasks are not frustrated by blur or color leakage Lightweight so the child doesn’t resist wearing them Compatible with the therapy charts/digital tasks being used.. Markers of quality: Frame labeled “pediatric” or “children’s size” Reversible design clearly described Filters tested for correct spectral response (manufacturer spec) Durable hinge or elastic strap (for younger ages) Protective case included Recommended by vision-therapy professionals or included in clinical therapy kits Certifications or clear therapeutic use statement (even if its accessory to therapy) Good reviews for kids (comfort, fit, durability) |
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