As a practical example, an astigmation corrected scanning flat holographio concave grating (SFHCG) is designed and some results of the numerical and optical experiments are given.
There was physiological diplopia on strabismus days and binocular stereopis on orthophoria days in all 24 cases.After surgery, the eye's position was corrected in 23 cases.They had normal stereopsis.
Apochromatic lens: Compound lens corrected for chromatic aberration, i.e. the three primary colours , red, green and blue are corrected. Also called Apochromat.