Experiment set BIOLOGY 3: EYE


Compact and versatile

This experiment set is used for a series of exciting practical experiments that allow pupils to familiarise themselves with the basics of sight, from how an image is formed to how it is processed by the brain. It uses simple apparatus to help them understand not only how the iris functions, but how we see in colour, the blind spot and how stereoscopic vision works. The pupils use the short rail to discover for themselves the optical effect of different types and strengths of lenses used for correcting visual impairments. Experiments on after-images, the phi phenomenon and complementary colour perception allow the pupils to draw precise conclusions about the physiology of rods and cones.

Variable focal length lens

The accommodation mechanism of the elastic lens of the eye with its circumferential suspension is demonstrated in a straight forward and plausible manner with the help of a continuously deformable lens. It provides a convincing illustration of how the lens works together with the iris to produce a sharp, well illuminated image on the retina.


01.01.10 Storage case

34.02.00 Inlay with cut-outs for apparatus, B3

41.03.00 Tube light

34.04.00 Retort stand rod

05.05.00 Transparent screen

05.06.00 Lens, +50, in holder

05.07.00 Lens, +100, in holder

41.07.10  White card with coloured areas

41.08.00  Spinning top

05.09.00 Lens, -100, in lens holder

34.10.00 Lamp holder

05.11.00 2 Simple lens holders

34.12.10 Colour filter, blue

34.12.20 Colour filter, green

34.12.30 Colour filter, red

04.13.00 Subtractive filter, yellow

04.14.00 Subtractive filter, magenta

04.15.00 Subtractive filter, cyan

05.15.00 2 Simple riders

05.16.00 Rider with slit

34.17.00 F-iris holder

34.18.00 Blind spot sheet

34.19.00 Track

34.20.00 F-iris with hole

34.21.00 Iris on lens holder

34.22.00  Lens with variable focal length on lens holder

02.23.00 2 Riders with screw



B3 – 1:   How an image is formed in the eye

B3 – 2:   Accommodation

B3 – 3:   Pupillary reflex

B3 – 4:   Pupil function

B3 – 5:   Near point

B3 – 6:   Convex and concave lenses

B3 – 7:   Short and far sightedness

B3 – 8:   Stereoscopic vision

B3 – 9:   Rods and cones 1

B3 – 10: Rods and cones 2

B3 – 11: Blind spot

B3 – 12: After-image 1

B3 – 13: After-image 2

B3 – 14: Additive colour mixing

B3 – 15: Subtractive colour mixing