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Description
Welch Allyn 3.5 V Coaxial Ophthalmoscope (Head Only)11720 Coaxial Ophthalmoscope Halogen light for true tissue colour and consistent, long lasting performance. The coaxial optics produce a shadow free spotlight, easier entry into undilated pupils and a larger field of view compared to standard ophthalmoscopes. 6 apertures: Micro allows quick entry into small, undilated pupils. Small provides excellent view of fundus through an undilated pupil. Large general examination of the eye through dilated pupil.
11720 | Coaxial Ophthalmoscope
- Halogen light for true tissue colour and consistent, long-lasting performance.
- The coaxial optics produce a shadow-free spotlight, easier entry into undilated pupils and a larger field of view compared to standard ophthalmoscopes.
-
6 apertures:
- Micro - allows quick entry into small, undilated pupils.
- Small - provides excellent view of fundus through an undilated pupil.
- Large - general examination of the eye through dilated pupil.
- Fixation - graduated cross-hairs for measuring eccentric fixation or locating lesions.
- Slit - used to determine levels of lesions and tumors.
- Cobalt blue - used with flourescein dye to view small lesions, abrasions and foreign objects on the cornea.
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2 filters can be used in conjunction with any of the above apertures:
- Red-Free filter - filters out red light for easy identification of veins, arteries and nerve fibers.
- Polarising filter - virtually eliminates corneal reflection.
- 28 focusing lenses with a range of -25 to +40 diopters, adjustable via easy-to-reach maywheel.
- Rubber brow-rest prevents scratching of eyeglasses.
- Variable illumination strength via the handle rheostat dial.
Aperture Selection Disc
Switch easily between 6 apertures via a disc on the head.
Six Apertures
A wide range of practical apertures to select from.
LENS Selection Disc
Focus on the fundus, cornea, iris and other ocular structures.
Two Filters
Red-free or polarising filter can be used in tandem with any aperture.
More information: Using Ophthalmoscopes in Eye Examinations
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.9 ★★★★★
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Product Reviews
★★★★★ 5
Comfortable and Nice Fit and Length
Style: 7" Swim Trunk, Color: Charcoal, Size: Medium
Comfortable, fit well, true to size, dried quickly after getting wet, washed easily
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Great shirt for the price.
Material Type: Recycled Polyester, Color: Electric Blue, Size: Large
Bought this for my son. Very nice shirt for the price, it is true to size and the color is the same as the picture. Would definitely buy it again. The material is good quality. No issues whatsoever
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Great purchase
Material Type: Recycled Polyester, Color: Dark Navy, Size: X-Large
Purchased several shirts, all were great quality. You never know what you’ll get when you purchase sight unseen, these are worth it. Great value, style, and comfort. Color is exactly what you see online. True to size.
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Reviewed in the United States on November 25, 2025
★★★★★ 4
Great quality for price
Material Type: Recycled Polyester, Color: Red Stripe, Size: XX-Large
Very impressed with the shirt quality, especially for such a low price. Sizing is accurate.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
For work or casual wear, this polo is a great choice.
Material Type: Recycled Polyester, Color: Port Stripe, Size: X-Large
I really like this polo. I've been wearing it once a week or every other week since November. Its very comfortable and breathable. This polo feels like it should last a while. The fit is good. I typcally wear XL and this XL fits great. I've pruchased it in both burgundy and black so far. I definitely recommend this shirt. For work or casual wear, this will look good.
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Reviewed in the United States on January 11, 2026