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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.
-
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
4.2 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Best Balls Ever!!!
Size: Medium
These are the best balls ever! We have 2 very active ball loving dogs and these bounce very well and they actually hold up with active play and chewing. They still look brand new after daily use for months!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
Finally a ball my power chewers cannot destroy
Size: Medium
I have two dogs, an American Bully and an American Pit Bull Terrier, and both of them love to chew. Most balls last a very short time around here before they are shredded or missing big chunks. This one has actually held up. They chase it, tug on it and sit and chew on it, and it is still in one piece with no pieces breaking off.
One of my favorite things is being able to put food inside. I add some kibble or small snacks, and they will happily sit and work on it for a long time. It keeps them busy, gives them something safe to chew, and they get a little reward while they play. When they are done, I just rinse it out and it is ready to go again.
If you have strong jawed dogs that usually destroy toys, this ball is worth trying. Mine really enjoy it and I feel better knowing they finally have a ball that can keep up with them.
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Reviewed in the United States on November 22, 2025
★★★★★ 5
My dog LOVES this ball
Size: Medium, Size: Medium
Does your dog destroy tennis balls in seconds?
Yes? Then your dog NEEDS this ball!
It's squishy like a tennis ball, fits in ball launchers (even the cheap ones) and bounces when it hits the ground.
My dog has been literally playing with this ball all day and not a single mark on it!
The only bad thing is that it does not float.
Definitely worth the money!
Put it in your cart!
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Perfect for ball demolishers
Size: Medium
The dogs love the chuck it brand. I don’t know what it’s made of but they go crazy over them. Will not play with another ball. Wonder if it’s “laced” with an addictive scent. Have pits. Very durable. Not able to chew to pieces. Last for about 6 months before there is a small break. I keep a back up because when the ball goes missing the house is in chaos. 😆 🤪
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Most durable ball!
Size: Medium
This are my dogs fav ball 😍 they last forever!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
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