OHTS calculator

Age (years)
Intraocular pressure (mmHg)
(average of 3 measurements per eye)
Central thickness of the cornea (µm)
(average of 3 measurements per eye)
Vertical c/d ratio
(average of both eyes)
Field of view (dB)
Humphrey PSD ("Pattern standard deviation")
(average of 2 measurements per eye)

or

Octopus LV ("Loss of variance")
(average of 2 measurements per eye)