Vision: When a foreign particle lands on the cornea what prevents it from migrat
ID: 3509183 • Letter: V
Question
Vision: When a foreign particle lands on the cornea what prevents it from migrating to the back of the eye and damaging the optic nerve? Why do you get a runny nose or sniffles when you cry? Trace the pathway of lacrimal fluid secretion complete drainage What medical condition develops with blockage of the canal of Schlemm (scleral venous sinus)? What eye region is damaged and how does this happen? The ciliary body consists of theprocess a muscle control? nd the muscle. What does this What region of the eye con What visual property is lost when rods are not functional? Explain why? Where is the blind spot of the eye? Why is it called a blind spot? tains only cones? What visual property is associated with this region?Explanation / Answer
1 Ocular mucus production prevent dust from rolling back Into the eyes. Rest is prevented by the synchronous blink reflex .
2.lacrimal sac. -- superior puncta ---nasociliary duct -- inferior meatus-- maxila bone -- valve of Hosmer a --inferior turbinate .
3.condition is knowns as glucoma Blockage of the aqueous humour flow causes increased pressure in the posterior chamber, and this pressure is transmitted by way of the vitreous to the optic nerve head and the retina. Abnormally high intraocular pressure that is unrelieved causes vision impairment.
4 . Ciliary epithelium secretes aqueous homour ,, ciliary muscle.
5. Cone cells are densely packed in the fovea centralis, a 0.3 mm diameter rod-free area with very thin, densely packed cones which quickly reduce in number towards the periphery of the retina.they are associated with the colour vision and bright light.
6. They would be not a loss of the vision but there will be reduction in the resolution in the dim light commanly known as night blindness.
7.visual field of each eye that corresponds to the position of the optic disk. Absence of the rods and cones make it impossible to sense picture in this region.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.