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Spinning Globe Large
Desk models of large spinning globes typically range from 8 inches to 13 inches in diameter and offer a great balance of size and functionality for office or home use.
₹500.00
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Description
Plastic
Beads
Nylon
String
Beads
wood
Therapeutic
heavier cords
Product description
- This globe is generously sized at 13 inches in diameter, offering ample space for clear and legible printing.
- It features 720° rotation, is illuminated with LED lights, and includes a metal base for stability.
| Topic | Discription |
| Purpose / Target Users | Distance visual acuity screening for adults / children in clinics, schools, optometry practices The chart is designed to measure how well a person can identify standardized optotypes at a set distance. The target users include patients undergoing refractive screening or basic vision tests. |
| Optotypes / Symbols | Letters (e.g., Sloan letters), or Tumbling E / Landolt C / pictorial symbols Standard charts use optotypes (letters, symbols) of equal legibility. |
| Scaling / Spacing | Geometric progression of optotype size (e.g., log MAR progression), horizontal spacing = width of optotype, vertical spacing = height of next line down This ensures consistent testing across lines and standardised measurement of acuity. |
| Range of Acuity / Line Sizes | Likely from e.g. 20/200 (6/60) at top down to 20/20 (6/6) or better at the bottom Traditional chart top row corresponds to “legally blind” approx 20/200. |
| Testing Distance | Possibly 6 m (20 ft) standard, or shorter (e.g., 3 m) depending on room size Many charts specify 6 m for standard acuity. |
| Physical Size & Portability | For a “Large” chart: maybe ~ 70 cm wide × 100 cm high (or larger) |
| Mounting / Display Features | Wall-mountable (flat on wall) or freestanding; good contrast (black optotypes on white background), non-glare surface Standard chart specs call for black on white background with appropriate luminance. |
| Included Accessories / Extras | Possibly a hanging kit, calibration certificate, protective backing, illumination/back-light, mask overlays Many higher-end charts include features to adjust brightness or backgrounds. |
| Durability / Material Qualities | Durable substrate (e.g., laminated plastic, PVC sheet, or aluminium panel), matte finish, washable surface, minimal glare |
| Usability / Marker of Quality | Adheres to standards (e.g., ISO 8596 for visual acuity charts), proper optotype size & spacing, consistent lighting & contrast, certification mark High-quality charts follow international geometric and optical standards. |
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