1 Hernias that contain a loop of intestine without blood supply (strangulated hernias) require emergency surgery. 2  Hernias that contain a trapped loop of intestine (incarcerated hernias) need to be repaired as soon as possible to avoid strangulation. Hernias that contain a loop of intestine without blood supply (strangulated hernias) require emergency surgery. 2  Hernias that contain a trapped loop of intestine (incarcerated hernias) need to be repaired as soon as possible to avoid strangulation.
The axis number on your prescription tells your optician in which direction they must position any cylindrical power in your lenses (required for people with astigmatism). This number shows the orientation or angle in degrees from 1 to 180. The number 90 means vertical position and 180 horizontal. A higher number for the axis does not mean that your prescription is stronger - it simply describes the position of the astigmatism.
The actions of these two muscles are antagonistic: one muscle must relax while the other contracts to execute horizontal eye movements. Four other extraocular muscles working together control vertical eye movements and eye rotation around the mid-orbital axis (Figure 8.1, right).he actions of these two muscles are antagonistic: one muscle must relax while the other contracts to execute horizontal eye movements. Four other extraocular muscles working together control vertical eye movements and eye rotation around the mid-orbital axis (Figure 8.1, right).