20 Optometry MCQS about Anatomy and Physiology of Cornea

 

  1. What is the outermost layer of the cornea made of? A) Epithelium B) Endothelium C) Stroma D) Descemet's membrane
  1. The cornea is responsible for what percentage of the eye's refractive power? A) 25% B) 50% C) 75% D) 100%
  2. What type of cells make up the corneal endothelium? A) Pigmented cells B) Photoreceptor cells C) Squamous cells D) Simple cuboidal cells
  3. What is the main function of the corneal epithelium? A) To protect the cornea from damage B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To help filter light before it reaches the retina
  4. The corneal stroma is made up of what type of cells? A) Fibroblasts B) Keratocytes C) Melanocytes D) Photoreceptor cells
  5. What is the main function of Descemet's membrane? A) To protect the cornea from damage B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To help filter light before it reaches the retina
  6. The cornea receives its oxygen and nutrients from what source? A) Blood vessels B) The aqueous humor C) The vitreous humor D) The limbal vessels
  7. The corneal endothelium is responsible for what important function? A) Maintaining the cornea's shape B) Providing oxygen and nutrients to the cornea C) Helping filter light before it reaches the retina D) Pumping out excess fluid from the cornea
  8. What is the main function of the corneal nerve fibers? A) To provide sensation to the cornea B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To help filter light before it reaches the retina
  9. What is the cornea's role in the process of light refraction? A) The cornea refracts light before it reaches the lens B) The cornea does not play a role in light refraction C) The cornea helps to control the amount of light that enters the eye D) The cornea helps to focus the light that enters the eye.
  1. What is the primary function of the cornea? A) To filter light before it reaches the retina B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To refract light before it reaches the lens
  2. What is the thickness of the cornea? A) 0.5-0.6mm B) 1.0-1.5mm C) 2.0-2.5mm D) 3.0-3.5mm
  3. What are the layers of the cornea from outermost to innermost? A) Epithelium, stroma, endothelium, Descemet's membrane B) Stroma, epithelium, endothelium, Descemet's membrane C) Epithelium, endothelium, stroma, Descemet's membrane D) Endothelium, stroma, epithelium, Descemet's membrane
  4. What is the main function of the corneal epithelium? A) To protect the cornea from damage B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To help filter light before it reaches the retina
  5. What is the main function of the corneal stroma? A) To provide oxygen and nutrients to the cornea B) To help maintain the cornea's shape C) To protect the cornea from damage D) To refract light before it reaches the lens
  6. What is the main function of the corneal endothelium? A) To provide oxygen and nutrients to the cornea B) To help maintain the cornea's shape C) To pump out excess fluid from the cornea D) To protect the cornea from damage
  7. What is the main function of Descemet's membrane? A) To protect the cornea from damage B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To help filter light before it reaches the retina
  8. What is the main function of the corneal nerve fibers? A) To provide sensation to the cornea B) To provide oxygen and nutrients to the cornea C) To help maintain the cornea's shape D) To help filter light before it reaches the retina
  9. What is the cornea's role in the process of light refraction? A) The cornea refracts light before it reaches the lens B) The cornea does not play a role in light refraction C) The cornea helps to control the amount of light that enters the eye D) The cornea helps to focus the light that enters the eye
  10. What is the main cause of corneal edema? A) Inflammation of the cornea B) Trauma to the cornea C) A decrease in the pumping activity of the corneal endothelium D) A build-up of fluid in the cornea
  11. What is the most common cause of corneal ulcers? A) Bacterial infection B) Viral infection C) Fungal infection D) Allergic reaction

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