The pocket clip serves as a pressure-activated switch. This pen uses a “soft” LED bulb.
AAA batteries are not included.
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The pocket clip serves as a pressure-activated switch. This pen uses a “soft” LED bulb.
The pocket clip serves as a pressure-activated switch. This pen uses a “soft” LED bulb.
AAA batteries are not included.
| Brands | iAdvantec |
|---|
This standardized vision test is designed for amblyopia screening and testing children who have difficulties when tested with the standard near vision card.
16 inches/40 centimeters testing distance.
Standardized adult Sloan Letter near vision card with proportionally spaced (logMAR) lines in ETDRS, format; line sizes range from 20/400 to 20/10 (6/120 to 6/3) equivalent.
16 inch, 40 cm testing distance.
The LEA 3-D Puzzle is designed for supporting the development of the concept of “same”, first with colors, then with black & white concrete forms that are prerequisites for the measurement of recognition acuity with the LEA SYMBOLS® tests at an early age.
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