SR-24A Rechargeable streak retinoscope
A rechargeable streak retinoscope for objective refraction. Knobs rotate the streak and change its width, with three light modes and three brightness levels, and the 122 g handle runs over 3 hours at maximum brightness. Supplied with the head and handle in a zip case.
Delivery, packing and documents
What the SR-24A does
Streak retinoscopy
The SR-24A projects a streak of light into the eye; reading the reflex gives the refractive error without relying on the patient’s answers.
Adjustable streak
Knobs rotate the streak and change its width. Three light modes, converging, diverging and parallel, and three brightness levels.
Rechargeable handle
The 122 g handle is rechargeable and runs over 3 hours at maximum brightness. Coated optics in the head.
Accommodation tests
Besides refraction, the retinoscope is used to check the accommodation response at near.
Children and non-verbal patients
Retinoscopy needs no answers from the patient, so it works with young children and patients who cannot respond reliably.
Zip case
Head and handle travel in a fitted zip case, 558 g in total.
A closer look at the SR-24A
Retinoscope head
Coated window and the knob that rotates and widens the streak.
Rechargeable handle
Knurled 122 g handle, over 3 hours at maximum brightness.
SR-24A kit
Retinoscope head and rechargeable handle in a zip case, 558 g.
SR-24A in figures
Published specifications. Anything not listed here is confirmed in writing on your quotation, never estimated.
Light
- Light
- Streak; brightness strong, medium, weak
- Light modes
- Converging, diverging, parallel
- Streak
- Rotates and changes width by knob
- Optics
- Multi-layer coated
Power and kit
- Battery life
- More than 3 h at maximum brightness
- Handle
- Rechargeable, 122 g
- Kit
- Retinoscope, handle and zip case; 558 g; 250 × 155 × 55 mm
- Charger
- 220 V / 50 Hz or 110 V / 60 Hz version
- Light source
- Halogen, 3.5 V / 2.8 W
Retinoscopy with a streak retinoscope
Why retinoscopy
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.
Lenses to neutralise the reflex
Use loose trial lenses in a trial frame, or retinoscopy racks such as the RS-S44 or RS-2R32 to slide a row of lenses in front of the eye.
Check before you order
- Charger: available as 220 V / 50 Hz or 110 V / 60 Hz; tell us your country and we supply the matching version.
- Light source and spare parts: confirmed on your quotation.
Good practice
- Keep a fixed working distance and allow for it: 1.50 D at 67 cm, 2.00 D at 50 cm.
- Have the patient fixate a distant target with both eyes open.
- Sweep the streak along each principal meridian and watch for with or against movement.
- Add lenses until the reflex is neutral, then subtract the working distance.
Often ordered with the SR-24A
SR-24A questions
What is a streak retinoscope?
A streak retinoscope is a hand-held instrument that projects a line of light into the eye. By watching how the reflex moves and neutralising it with lenses, the examiner measures the refractive error objectively. The SR-24A is rechargeable, with three brightness levels and an adjustable streak.
How long does the SR-24A run on a charge?
More than 3 hours at maximum brightness. The handle is rechargeable; the charger comes in a 220 V / 50 Hz or a 110 V / 60 Hz version, matched to your country.
Which light modes does it have?
Three: converging, diverging and parallel, each at strong, medium or weak brightness.
Which lenses do I use with it?
Trial lenses in a trial frame, or retinoscopy racks. The RS-S44 covers ±0.25 to ±5.00 D with adjustable PD; the RS-2R32 has plus and minus racks to ±12.00 D.
What is in the kit?
The retinoscope head and the rechargeable handle in a zip case, 558 g in total.