Beginner Iris Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. What is the central opening in the iris called?
- Limbus
- Optic disc
- Fovea
- Pupil
Q2. The iris is the most anterior part of which coat of the eyeball?
- Tenon capsule
- Vascular coat
- Fibrous coat
- Neural coat
Q3. Which structure lies immediately anterior to most of the iris?
- Optic nerve
- Choroid
- Vitreous chamber
- Anterior chamber
Q4. Which structure lies immediately posterior to the iris?
- Posterior chamber
- Subarachnoid space
- External acoustic meatus
- Vitreous chamber only
Q5. Which iris muscle constricts the pupil?
- Ciliary muscle
- Sphincter pupillae
- Superior rectus
- Dilator pupillae
Q6. Which iris muscle dilates the pupil?
- Dilator pupillae
- Sphincter pupillae
- Orbicularis oculi
- Levator palpebrae superioris
Q7. Which autonomic division causes pupillary constriction?
- Somatic motor division
- Parasympathetic division
- Sympathetic division
- Enteric division
Q8. Which autonomic division causes pupillary dilation?
- Branchial motor division
- Sympathetic division
- Somatic sensory division
- Parasympathetic division
Q9. Where is the iris attached peripherally?
- Optic disc
- Posterior sclera only
- Fovea centralis
- Ciliary body
Q10. What is the main optical function of the iris?
- Formation of the optic nerve
- Production of visual pigments
- Regulation of light entering the eye
- Detection of color by cones