Light Sense

Optomotor response in insects

Principle

Behavioural physiological measurement of the time resolving capacity of the compound eye of flies (without electrophysiological leads).

Tasks

1. To determine the ratio of right and left turns made by a f ...

Determination of the human visual field

Principle and tasks

Determination of the visual field of the right and left eye for white, blue, red and green. Detection of any visual field deficiency (scotoma). Location of the blind spot (site of optic nerve emergence). The extent of the visual fields of bo ...

Time resolving capability of the human eye

Principle and tasks

To determine the flashing frequency of an LED at which the impression of a continuous light just occurs. To change the direction of incidence of the light using a perimeter. To determine the flicker fusion thershold of the left and right eye in relation to ...

Test of human reaction capacity

Principle and tasks

Measurement of dead time in a reaction test. Analysis of the tansient response. Determination of threshold frequency for stimuli. Study of the effects of noise and alcohol on reaction capacity. The test subject should follow a rectangular cu ...

Human electrooculography (EOG) (with the Cobra3 Basic-Unit)

Principle

To record the changes in the elctrical field induced by eye movements, using electrodes stuck to the skin near the eyes.

Tasks

To measure an electrooculogram (EOG) with a practised reader, a less practised ( ...

Additive colour mixing and colour masking

Principle

Production of mixed colours and white light by superimposed projection (additive mixing) of red, blue, and green light.

Tasks

1. Brightening of the colour spot (white masking) or its surroundings (black masking) ...