Riester 3794-203 Ri-vision Retinoscope Sets - LED Illumination
SKU: 92367687915

Riester 3794-203 Ri-vision Retinoscope Sets - LED Illumination

Sale price$179.55 Regular price$199.50
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Description

Riester 3794-203 Ri-vision Retinoscope Sets - LED IlluminationThe Riester Ri Vision Retinoscope Diagnostic Set is intended to diagnose near and farsightedness, astigmatism and other related refractive flaws of the eye. It has high performance optics in one portable package. It features a slit Retinoscope with a 3. 5V xenon slit light, which can be adjusted by a knurled thumb screw. It has an integrated eyeglass protector and is attached with a bayonet fitting. An outer casing made of impact resistant ABS plastic

The Riester Ri-Vision Retinoscope Diagnostic Set is intended to diagnose near- and farsightedness, astigmatism and other related refractive flaws of the eye. It has high performance optics in one portable package.

It features a slit Retinoscope with a 3.5V xenon slit light, which can be adjusted by a knurled thumb screw. It has an integrated eyeglass protector and is attached with a bayonet fitting. An outer casing made of impact-resistant ABS plastic offers durability.

The Ophthalmoscope features a hand wheel with semi circle, small, medium, and large circle with slit and fixation star. It also has a diopter wheel with 29 corrective lenses and filter wheel with red, blue, and polarization filter options.

The Ri-vision® Retinoscope Set includes the Ri-scope® Slit-Light Retinoscope Head with a 3.5V Xenon Lamp and the Ri-scope® L2 Ophthalmoscope Head, with either Xenon or LED illumination. The set includes a "C" Handle which has the Rheotronic® Electronic Switch feature for automatic switch-off after 120 seconds for conservation of the batteries. This handle needs 2 CR123A Li-Ion batteries (Not included). A spare lamp and 2 fixation cards are included as well. The set comes in a hard case with a safety catch.

The Retinoscope Set is made in Germany and comes with a 2 year warranty.

Ri-scope® Slit-Light Retinoscope

  • Measures the refractive power of the eye
  • Refractive flaws and astigmatism can be detected
  • Line light beam

Ri-scope® L2 Ophthalmoscope, Xenon or LED Illumination

  • 3.5V or LED or Xenon illumination
  • Diopter wheel of 29 corrective lenses
  • Easy to operate aperture hand-wheel
  • Apertures - Semi-Circle, Small/Medium/Large Circle, Fixation Star, and Slit
  • Filter wheel For all apertures - Symbol Display, Red-Free Filter, Blue Filter and Polarization Filter
  • Aspherical condenser lens
  • Parallel beam path
  • Rheotronic® Electronic Switch for automatic switch-off after 120 seconds
  • Dust-proof
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 92367687915

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4.5 ★★★★★
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M
Verified Purchase
M M
Charlottesville, US
★★★★★ 5
Awesome USB-C Hub
My new MacBook Air has USB-C ports only, so I recently upgraded to this USB-C hub, a 7in1 Multi-Port USB-C Adapter, and it has completely solved all of my port needs. With the two USB-A ports, I can still use my old memory sticks, without replacing them, as well as two USB-C ports, all making moving files, movies and pictures, with ease. I needed something fast and reliability, and this little device delivers on both fronts. One of the USB-C ports it a power passthrough, which works great for charging device, like my MacBook Air. It is very easy to use, just plug and play, making it compatible with the MacBook Air. Also has a built in card reader, and a HDMI port, pretty much covering all your port needs. If you are looking for a well built, reliable, fast, and compact USB-C hub that can everything, this is the one to get. Highly recommended!
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Reviewed in the United States on May 5, 2026
M
Verified Purchase
Michael Breinig
Alexandria, US
★★★★★ 5
Good value and best of all - it works
This did the job I wanted it to. Expanded the ports when my laptop just ran out. No delay or ANY issue no matter what I plugged where and after a little figuring out where things went (not difficult) its performing very well. As far as value, its great. I always evaluate something by if I would purchase it again. Yes I would. if you need it, get it and set it up and move on with less worry about port capacity.
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Reviewed in the United States on May 28, 2026
S
Verified Purchase
Simon
Boise, US
★★★★★ 4
Good Multipurpose Hub, Some Limits on Power Draw
I use this with a Dell Latitude 7430 with a 65W charger, and it works fine as a docking hub. The only problem I've encountered is when rebooting, the boot will pause with a warning message to tell me that the laptop may encounter reduced performance because it isn't able to receive the full 65 watts. I don't get that warning if I'm not running the power supply through the hub. Otherwise, if I just use the hub as a port extender everything is fine. It has a compact design and is reasonably lightweight. It would be ideal for travel. Like my other Anker hubs, it's well constructed and doesn't feel cheap although it's good value for money.
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Reviewed in the United States on June 9, 2026
T
Verified Purchase
The Gabers
Pawtucket, US
★★★★★ 5
I don't know how I ever lived without it.
I'm very happy with this device. My laptop doesn't have an ethernet port and only has one USB-C SuperSpeed port, so I bought an ethernet to USB-C cable to connect my ethernet switch to the Anker and into my laptop's USB-C port, and it works great. I don't need a fast internet connection for the things I do, so my service is only a 50mbps symmetrical up/down connection, and that's what I get even while transferring files from my external between other devices, charging my phone, and using composite devices. I bought the Anker 100W Compact and Foldable USB C Charger for it and it charges my S24 extremely fast. It's very well built, yet super lightweight. I love the sleek, slender design. It's the perfect size to easily slide into a pocket, store in a desk drawer, or keep handy in a laptop case or backpack. Using it is easy. Just plug it into your computer and plug your devices into it. Just make sure you have a power supply for it if you're charging or powering other devices, using external storage, or running anything else that taxes USB power. I have had ZERO connectivity issues with it — no random disconnect/reconnect blips, no failed transfers for huge amounts of data that have taken up to 45 minutes, no static his or crackle when my headset is running through it... no problems at all. It's actually kind of spooky now that I think about it... I can't recall a time I've ever had a similar device that didn't have some nuance that got under my skin, like a loose connection, random disconnections, having to reinstall the drivers all the time, or having to troubleshoot just to get it connected for the first time. The most stress I've put it through was with my keyboard connected, ethernet running through it, my S24 charging and transferring about ~20gb of pictures and videos to my 2T external HD at the same time that my laptop was transferring about ~500gb of media and documents to the HD, too, and I was surprised by how warm it DIDN'T get. My only complaint is trivial and unique to my situation — I wish output cord was longer. About six inches would do. My laptop sits up on an adjustable stand that clamps to my desk, and the end where the output cord is hangs a few inches off of my desk. This puts extra stress on the USB-C port and can wear it out faster or damage it. I haven't had a use for the HDMI port yet, but I eventually will. I use all of the other ports for my work and personal devices, though. These include: a 2tb external hard drive; a Poly Blackwire 3320 Series headset; a dongle for a wireless mouse/keyboard combo or a wired keyboard and a dongle for a wireless mouse; my Galaxy S24 charges and transfers files through it super fast; I have several thumb drives ranging from 20gb to 512gb that I regularly use; I recently bought an RCA/S Video-to-USB converter to digitize old home movies I plug into it, too.
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Reviewed in the United States on October 25, 2025
C
Verified Purchase
Carl H
Dallas, US
★★★★★ 5
Anker wins again.
Worked well for usb hub but hdmi was not reliable. Disappointed because usually Anker products are good quality. UPDATE: Anker voluntarily offered a refund so my faith in Anker has been fully restored.
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Reviewed in the United States on May 5, 2026

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