Home > Optometry Instrument > Near chart vision > LY-23NS Near vision acuity chart

LY-23NS Near vision acuity chart

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Product Abstract:

Vertical style,For testing at 30cm.


Product Description
 
Specifications
1.It's one-sided.
2.It's vertical.There is also horizontal style.Please see below link:
3.Test distance is 30cm .Led illuminated near vision acuity. It's for weak sight,hyperopia and presbyopia testing.
 
 
Features:
1.Using high-tech light-emitting,power saving,slim and accuracy testing.
2.High brightness and uniform light-emitting make every chart be with consistent brightness contrast.It ensures
accuracy testing.
3.LED photoelectric conversion efficiency is more than 80%.the same brightness of the light just around 10% 
of the electricity needed to traditional fluorescent lamp.
4.Protect eyesight: DC drive, no flash(Normal lights are AC drive, it will inevitably produce strobe).
5.Health: Healthy light contain ultraviolet and infrared light, no radiation (ordinary light contains ultraviolet
and infrared).
6.Green: no mercury,xenon or other harmful elements, and will not produce 
electromagnetic interference (ordinary lamp contains mercury and lead elements, electronic ballasts will
produce electromagnetic interference).
7.Long life: life of up to 100,000 hours.
8.Safety factor: safety voltage, current, and smaller, less heat, no security risk.
 
 
 
Packaging Detail: 29cm x 20cm x 6cm, 0.55kg 
 
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