Modifies a noun

• lens: At the heart of each magnifier is an aspheric lens designed to give a sharp, distortion free image.

• element: The 18x optical zoom lens has an aspheric element, which gives sharp, high contrast footage across the image.

• design: Aspheric designs, principles of fitting, fluorescein patterns, photorefractive surgery, diabetes and red eye.

• departure: The IR3 can directly handle some 30 waves ( at 10.6 microns ) of aspheric departure i.e. with no null lens.

• surface: Results of form control on aspheric surfaces are presented, with an interpretation in terms of spatial frequencies.