5.3 vision

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

5.3 vision

The eye

Notes

• Eyebrow (wenkbrauw): Protects the eye against sweat and other liquids (vloeistoffen)

• Eyelashes (wimpers): protects the eye against dirt and bright light

• Sclera (harde oogvlies): white of the eye. The eye muscles are attached to the sclera

• Pupil: The pupil lets light into the eye.

Pupil reflex

Pupil gets smaller in bright light

Pupil gets larger in dim light

What do we
call this reflex?

1. Light reflex
2. Iris reflex
3. Pupil reflex
4. Light protection

https:

iris

retina

sclera

cornea

pupil

optic nerve

lens

retina

Cones are for: Color (red / blue / green)

Rods are for: Light (black / white)

retina

cones work well in bright light

rods function in dim light

the fovea is the most sensitive part (lots of cones)

retina

retina

blind spot/optic nerve

kidshealth.org

https:

(-) minus lenses

(+) plus lenses

glasses

- short - sightedness: you can’t see sharp in the distance, you need - (concave) glasses, your eye is too long, or your lenze can’t flatten enough

- long - sightedness: you can’t see sharp up close, you need + (convex) glasses, your eye is too short, or your lenze can’t contract enough

kidshealth.org

vocabulary?

we will read the paragraph together and write down difficult words