retinal haemorrhages which can occur in diabetes: what is there exact location, how do they disappear, and how long do they take to disappear?
Pre-retinal and sometimes under inner limiting membrane with a characteristic flat top or vitreal and spreading. Reabsorption may take weeks depending on extent and loss of vision is directly related to obscuration of the macula Q: Regarding iop measurement techniques: I believe the contact method uses the concept that the amount of force needed to flatten a specific amount of the cornea, is proportional to the IOP, whereas I don’t completely understand how the non contact method works? A: Non Contact tonometry: you may need to go through some old uni notes here. There are two basic methods – one method is measuring the time it takes to flatten the cornea, the piston pressure remains constant. The other is an increasing piston pressure cutting off at the point where the cornea is flattened. A light beam is directed on to the cornea and is reflected back into a receiver at the point when the cornea is flattened.
