A portable digital retina camera in 30 field of view without mydriatic is designed based on Gullstrand-Le Grand eye model. After the comprehensive consideration of both the human eye and the camera

this design realizes the highly clear image with 2 mega pixels in all fields of view. And an eye model is used in this design to diminish the chromatic aberration brought by the human eyes themselves

so that the camera could use in the visible band. Meanwhile

in case of the stray lights caused by the cornea

the illuminating system with an annular stop and coaxial illumination is specially designed. The result shows that the resolution of this system is 120lp/mm

the field curve value is less than 0.86mm and the distortion value is only 7.2%

and this camera has strong abilities for accommodation

which could adapt the different eyes from -10D to 7D.