Do a selection of the activities.
Other things to add:
Show pictures of other animals' eyes - all different colours and pupils of different shapes e.g. eyes from Evolution book (see resource).
Show a picture of a girl with cat eyes, and ask students to
About 1 in 12 men (8%) and 1 in 200 women in the world are colourblind, though not all the cases are extreme, and someone might not even realise they have partial colourblindness. Colour blindness is usually from a genetic cause (in your DNA and inherited from parents). The most common kind is red/green colourblindness, and is partial or complete loss of sensitivity to red and green colours. In the more extreme cases (protanopia - loss of red, and deuteranopia - loss of green) colours containing red or green appear yellow or brown, and blues and purples are confused. Less extreme cases (deuteranomaly - partial loss of green) are most common, where reds appear browner and purples appear bluer. https://en.wikipedia.org/wiki/Color_blindness#/media/File:Color_blindne…
Find out what it is like to be colour blind: http://www.colourblindawareness.org
ingridscience afterschool did eye examination and dissection, lenses activities, blind spot and colour reversal illusions.
Grandview did eye examination, looked at pictures of animal eyes, coloured filters and eye placement in predators and prey.