11. A split diopter does not create real deep focus, only the illusion of this. 12. Those with accommodative insufficiency typically have PRA values below " 1.50 diopters . 13. His refractive error was + 10 Diopters in each eye, similar to current glasses. 14. If the difference between the eyes is up to 3 diopters , iseikonic lenses can compensate. 15. The lens can focus on a plane in the background and the diopter on a foreground. 16. Hipparchus measured the apparent diameters of the Sun and Moon with his " diopter ". 17. Only about 20 % of children with hyperopia greater than + 3.5 diopters develop strabismus. 18. Stacking lenses combines their power by simple addition of diopter strength, if their separation is negligible. 19. Though endorsed by many 3D websites, the diopter " fix " effect is still somewhat controversial. 20. Like all focusing anamorphics, Iscoramas cannot focus on close subjects without the assistance of a diopter .
