A calculator designed for trainees and healthcare providers involved in ophthalmic care.
Intuitive user interface.
The App consists of:
Thirty Three formulae
1.Abbe number
2.Accomodation Amplitude
3.Astigmatism nomenclature
4.Compensated power
5.Critical angle formula
6.Effective lens power formula
7.Equivalent lens power formula (Thick lens Formula)
8.Flat transposition
9.Fresnel’s equation
10.Illuminance equation
11.Index of refraction
12.Law of refraction
13.Lens maker equation
14.Lens power formula
15.Lens tilt Formula (Martin’s formula)
16.Lens transmission equation (Lamberts formula)
17.Magnification
18.Minimum blank size
19.Obliquely crossed cylinders (Thompsons formula)
20.Oblique meridian power
21.Optical center location (Thick lenses)
22.Polarisation equations (Brewtsers formula, Malus’ formula)
23.Prentice’s rule
24.Prism Power
25.Resolving prism
26.Resultant prism
27.Spectacle magnification
28.Spherical equivalent
29.Snell’s law
30.Surface power equation
31.Vergence equation
32.Vertex power (Thick lenses)
33.Wave equation
Dr Anmar Abdul-Rahman is a Consultant Ophthalmic Surgeon, Medical Retina and Glaucoma Subspecialist at Counties Manukau DHB, Auckland, New Zealand. He is also an Honorary Clinical Senior Lecturer at the University of Otago.