Podcast
Questions and Answers
What is the function of the limbus in relation to the cornea?
What is the function of the limbus in relation to the cornea?
- To provide a pathway for aqueous humour outflow
- To provide nourishment to the peripheral cornea (correct)
- To regulate corneal stroma swelling pressure
- To transmit circumferential or tangential collagen fibrils
What is the characteristic of terminal axons in the corneal nerves?
What is the characteristic of terminal axons in the corneal nerves?
- They are very sensitive to pain and temperature (correct)
- They have a high myelin sheath content
- They are relatively insensitive to pain and temperature
- They are only present in the sclera
What creates a swelling pressure in the corneal stroma?
What creates a swelling pressure in the corneal stroma?
- The relatively avascular nature of the sclera
- The absence of elastic fibres
- The Donnan effect (correct)
- The presence of collagen fibrils
What is the characteristic of the corneal stroma?
What is the characteristic of the corneal stroma?
What is the significance of the circumferential or tangential collagen fibrils in the limbus?
What is the significance of the circumferential or tangential collagen fibrils in the limbus?
What is the relationship between the corneal touch threshold (CTT) and sensitivity (s)?
What is the relationship between the corneal touch threshold (CTT) and sensitivity (s)?
What is the result of the transient binding of free chloride ions to the ligands?
What is the result of the transient binding of free chloride ions to the ligands?
What is the refractive index of human corneal collagen?
What is the refractive index of human corneal collagen?
What is the name of the theory that suggests the cornea is transparent because the refractive index of the collagen fibrils matches the refractive index of the matrix?
What is the name of the theory that suggests the cornea is transparent because the refractive index of the collagen fibrils matches the refractive index of the matrix?
What is the main reason why the cornea is transparent, according to the Short Range Order theory?
What is the main reason why the cornea is transparent, according to the Short Range Order theory?
What is the characteristic of the collagen fibrils that allows them to act as a diffraction grating?
What is the characteristic of the collagen fibrils that allows them to act as a diffraction grating?
What happens to the straight through light when it passes through the cornea?
What happens to the straight through light when it passes through the cornea?
What type of proteins are present in the cytoplasm of keratocytes?
What type of proteins are present in the cytoplasm of keratocytes?
What type of order is absent in the arrangement of collagen fibrils in the cornea, according to X-ray diffraction studies?
What type of order is absent in the arrangement of collagen fibrils in the cornea, according to X-ray diffraction studies?
Why are keratocytes transparent?
Why are keratocytes transparent?
What is the characteristic of the hexagonal fibers in the lens?
What is the characteristic of the hexagonal fibers in the lens?
What is the function of alpha-crystallin in the lens?
What is the function of alpha-crystallin in the lens?
What is the prevalence of age-related cataracts in people over 85 years of age?
What is the prevalence of age-related cataracts in people over 85 years of age?
