retinal blood vessels การใช้

• Wet AMD causes sub-retinal blood vessels to grow excessively, which causes almost immediate central blindness.
• Because retinal blood vessels absorb light more readily than the surrounding tissue, the amount of reflection varies during the scan.
• The floaters may be debris, but may also be blood, if the tear extends through a retinal blood vessel.
• Narrowing or blocked retinal blood vessels can be seen clearly and this is called retinal ischemia ( lack of blood flow ).
• In the letters column of the current issue of Sky & amp; Telescope, Sheehan and Dobbins share this insight and drive home their point with two striking circular images, one a Lowell sketch of the Venusian spokes, the other a photograph of retinal blood vessels.
• If the separation of the vitreous from the retina is not complete, areas of focal attachment or adhesions can occur, i . e . a VMA . The pulling forces or traction from this adhesion on the retinal surface can sometimes cause edema within the retina, damage to retinal blood vessels causing bleeding, or damage to the optic nerve causing disruption in the nerve signals sent to the brain for visual processing.