Limitless IGCSE Biology
Exam 14.2.7: Fovea & Blind Spot
ASection A: Identification (Paper 2 - MCQ & Labeling)
Questions 1-5: Multiple choice and diagram labeling
Study the diagram of the human eye below. Identify the structure labeled X.
Structure X is located on the retina at the back of the eye
Hover over different parts of the eye to see their functions
Which statement about the fovea is correct?
The blind spot is the region of the retina where:
Which type of photoreceptor cell is found in the highest concentration at the fovea?
Why do we not notice a "gap" in our vision corresponding to the blind spot?
BSection B: Explanation (Paper 4 - Theory)
Questions 6-10: Extended written responses with keywords
State the function of the fovea.
[2 marks]Mark Scheme Keywords (include these in your answer):
Explain why there is no vision at the blind spot.
[2 marks]Mark Scheme Keywords (include these in your answer):
Describe the distribution of rods and cones in the human retina.
[3 marks]Mark Scheme Keywords (include these in your answer):
Explain why we look directly at an object when we want to see it in detail.
[2 marks]Mark Scheme Keywords (include these in your answer):
A student looks at a dim star at night. Explain why the star appears clearer when the student looks slightly to one side of it rather than directly at it.
[3 marks]Mark Scheme Keywords (include these in your answer):
CSection C: Application & Investigation (Paper 6)
Questions 11-15: Evolutionary adaptations and experimental design
Suggest why predatory animals (such as hawks or eagles) have a high concentration of cone cells in their fovea.
[2 marks]Mark Scheme Keywords (include these in your answer):
A student investigates the blind spot by holding a card with two dots (X and Y) at arm's length. Describe how the student could demonstrate the presence of their blind spot.
[3 marks]Mark Scheme Keywords (include these in your answer):
Explain why nocturnal animals (such as owls) have a retina with a much higher proportion of rod cells compared to cone cells.
[3 marks]Mark Scheme Keywords (include these in your answer):
A student reads that some deep-sea fish have eyes with only rod cells and no cone cells. Suggest why this adaptation is beneficial.
[2 marks]Mark Scheme Keywords (include these in your answer):
Design an investigation to compare the visual acuity (ability to see detail) of the fovea compared to the peripheral retina. Include the independent variable, dependent variable, and one control variable.
[4 marks]Mark Scheme Keywords (include these in your answer):
Limitless IGCSE Biology • Cambridge International 0610 • 2026-2028 Syllabus
Learning Objective 14.2.9: Identify the position of the fovea and state its function
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