Question 3(a)
[Maximum number: 1]
The diagram shows a human eye with some structures labelled.
Which structure is the retina?
A
P
B
Q
C
R
D
S
Edexcel IGCSE Biology 2.91 Glucose homeostasis
Practise labelling eye structures and explaining how the cornea, lens, retina and iris affect light entry and vision quality.
How this is tested
- identify the cornea, lens and retina on eye diagrams and link each structure to its function
- explain cataracts or iris pigment effects using light entry, retina stimulation and blurred vision
- interpret field-of-view diagrams to explain depth perception in predators with forward-facing eyes