The depth-of-focus of the human eye for Snellen letters.

@article{Tucker1975TheDO,
  title={The depth-of-focus of the human eye for Snellen letters.},
  author={James Tucker and William Neil Charman},
  journal={American journal of optometry and physiological optics},
  year={1975},
  volume={52 1},
  pages={3-21}
}
Snellen acuity is determined as a function of refractive error for two subjects under cyploplegia, using randomised test charts, constant test chart luminance and a series of artificial pupils. These results allow determination of the depth-of-focus of the eye for Snellen targets, and it is shown that both optical and retinal factors influence the depth-of… CONTINUE READING