Welch Allyn 11720 Halogen Ophthalmoscope Head 3.5V The patented Welch Allyn Coaxial Vision System facilitates ophthalmoscopy by enabling easier entry into the eye, a larger field of view, and reduced glare compared to standard ophthalmoscopes.
* Halogen HPX lamp provides light for true tissue color and long-lasting performance
* Coaxial optics produce a shadow-free spot, easier entry into undilated pupils, and a larger field of view versus standard ophthalmoscopes
* Detect corneal abrasions with cobalt blue filter
* Polarizing filter virtually eliminates corneal reflection
* Sealed optics keep out dust and dirt
* 18 unique aperture/filter combinations for greater versatility
* Red-free filter may be used with any aperture
* 28 focusing lenses with a range of -25 to +40 diopters