Ametropia1: parallel light after myopia eye inflectional system, focusing on the front of retina.2: parallel light through the hyperopic eye
1: parallel light after myopia eye inflectional system, focusing on the front of retina.
2: parallel light through the hyperopic eye inflectional system, focusing on the retina.
3 parallel astigmatism: light through the eye of the inflectional system, before and after the formation of two focal line.
The concept of aberration: the image of an object cannot be accurately reproduced by an optical system.
Low order aberrations and higher order aberrations of human eyes
1 low order aberrations in myopia, hyperopia and astigmatism
2 high order aberration: spherical aberration, coma and trefoil
The influence of aberration on visual quality
3, star blindness
4, night vision decline
5 contrast reduction
The significance of wavefront guided refractive surgery in a real sense
1 optometry results more accurate and has obvious advantages in detection and axial astigmatism
2 enhance the clarity of the image
3 better night vision
4 repair of residual problems after surgery