Two racks of 16 lenses each, a black plus rack and a red minus rack, from ±0.50 to ±12.00 D, so you reach high powers quickly in retinoscopy. Supplied in a foam-lined aluminium case.
A rack slides a row of lenses in front of the eye one after another, so you neutralise the reflex without changing trial lenses by hand.
The RS-2R32 has a red concave rack for myopia and a black convex rack for hyperopia and presbyopia, 16 lenses each from ±0.50 to ±12.00 D.
The racks run in 0.50 D steps to 7.00 D, then 8.00 and 12.00 D, so high powers are on hand without a trial lens set.
The racks ship in a foam-lined aluminium case.
Red minus and black plus racks, 16 lenses each, ±0.50 to ±12.00 D.
The RS-2R32 racks ship in a foam-lined aluminium case.
Published specifications. Anything not listed here is confirmed in writing on your quotation, never estimated.
A rack slides a row of lenses in front of the eye one after another, so you neutralise the reflex without changing trial lenses by hand. That keeps the test short, which matters most with children.
Retinoscopy measures the refractive error from the light reflex in the pupil, so it works with young children and with patients who cannot give reliable answers. It is also a quick objective starting point before subjective refraction.
A retinoscopy rack holds a row of trial lenses on a handle or bar. You slide it in front of the eye to neutralise the reflex quickly, without changing loose lenses. Racks are common for children and for fast checks.
Each rack has 16 lenses: 0.50 to 7.00 D in 0.50 D steps, then 8.00 and 12.00 D. The black rack is plus, the red rack is minus.
Red racks hold minus (concave) lenses and black racks hold plus (convex) lenses, on both the RS-S44 and the RS-2R32.
Yes. The racks supply the lenses; a streak retinoscope such as the SR-24A gives the reflex you neutralise.
No. Racks speed up retinoscopy; the final prescription is still refined with a trial lens set and trial frame or a phoropter.
