The Night Vision module allows the measurement of rod and cone sensitivities without the need for extended dark adaptation (saving half an hour per subject) and provides useful data on rod and cone losses as a function of age or in patients with diseases of the retina.
Order code: NV-PROFILE. Cost: £495 (£385 when bought with FP-MODULE).
Spectrally calibrated neutral density sunglasses (required to measure rod sensitivities). Order code: ND-GLASSES-1L0. Cost: £341.