18 unique aperture/filter combinations for greater versatility: micro, small, and large spot sizes, cobalt blue filter for corneal exams, fixation target, and slit aperture (all on a 6-position, continuously rotating aperture dial). Plus: red-free filter, polarizing filter, and unfiltered Halogen HPX on a 3-position switch–each position can be engaged with each of the 6 positions of the aperture dial, for a total of 18 possible combinations.
Sealed optics keep out dust and dirt for years of maintenance-free operation.
Rubber brow rest prevents scratching of eyeglasses.
28 focusing lenses with a range of -25 to +40 diopters.