Mini Loupes are designed to be ultra light and comfortable. Standard Loupes : larger field of view and a two lens system Hi-resolution Loupes : bright image and larger field of view. Prismatic Loupes : higher magnification and field of view. TYPES OF SURGICAL LOUPES MINI LOUPES Lightweight Excellent image Quality optics Great field of view Mini …
Keplerian telescopes are longer and heavier than the simpler Galilean design as they incorporate prisms to reorient what would otherwise be an upside-down and inverted image. They provide better optics with about twice their field of view at least twice as large (about 12 degrees at 4x).
All low vision ophthalmic Keplerian telescopes are focusable (with one autofocusing version) and are most frequently prescribed in 3x, 4x, 5x and 6x powers.
The Galilean form is available as both fixed-focus and focusable versions and are usually prescribed in 1.7x, 2.2x and 3x powers, and are available as high as 6x. However, their small size and low weight is useful for binocular prescriptions.