Eye Dissection

• What is the first step in the eye dissection method described?

  Examine the outside of the eye
• After examining the outside of the eye, what is the second step?

  Cut away the fat and muscle
• What instrument should be used to make an incision in the cornea?

  A sclpel
• What is the purpose of the incision made in the cornea?

  To release the aqueous humour
• What type of liquid is the aqueous humour?

  A clear liquid
• What is the main function of the aqueous humour?

  Keeps the shape of the cornea
• After releasing the aqueous humor, where should a second incision be made?

  Through the sclera in the middle
• After making an incision through the sclera, what tool is used to cut around the middle of the eye?

  Scissors
• What eye structure will be on the front half of the dissected eye?

  The cornea
• After removing the cornea, what structure should be removed next?

  The iris
• What can make the iris difficult to remove?

  It might be stuck to the cornea
• After the iris, what is the next structure to be removed?

  The lens
• What should you do if the vitreous humor is still in the eyeball?

  Empty it out
• After emptying the vitreous humor, what are you trying to locate in the retina?

  The blind spot
• How can you separate the fibers of the optic nerve?

  Pinch the nerve with scissors
• What is the function of the aqueous humor in the eye?

  Keeps the rounded shape of cornea
• Why is the blind spot called 'blind'?

  There are no sight-sensitive cells
• What type of vision do cones provide?

  Colour vision in bright light
• What two structures does the cornea cover?

  The iris and pupil
• How does the cornea contribute to vision?

  Begins bending light to make an image
• What is the function of the iris?

  Controls how much light enters the eye
• Where is the iris suspended?

  Between the cornea and lens
• What is the primary function of the lens?

  Makes an image on the retina
• What property allows the lens to focus on objects at varying distances?

  Its ability to change shape
• What surrounds each nerve fiber?

  A myelin layer
• What is the function of the optic nerve?

  Carries information from the retina to brain
• What is the function of the tapeum?

  Reflects light back through the retina
• What is the function of the vitreous humor?

  Helps give the eyeball its shape
• What type of substance is the vitreous humor?

  Thick, clear jelly
• What is the sclera?

  Part of the eye
• What happens to light as it passes through the cornea?

  It bends
• Where is the tapeum located in the eye?

  Behind the retina
• Besides the cornea, what other eye structure bends light to form an image?

  The lens