I have been updating some calculators, here are the links:

  • Prisms: calculate the magnitude and angle resultant of two prisms, useful to know the orientation and magnitude of a fresnel prism in glasses. 



  •  Optotypes: Calibrate your optotypes or see what is the visual acuity if you change the intended distance of the test.


sia calculator

  • Glaucoma guide: Based on the flow charts of the European Glaucoma Society 2nd edition.

glaucoma guide


  • And of course RSG, much more than a calculator, the best tool to monitor your refractive surgery outcomes.