Doctor insights on:
What Does Cylindrical 50 Mean
Astigmatism: If the front of the eye or the internal lens is not a perfect sphere and is slightly oval, it may require special correction in one direction. This is referred to as cylindrical power necessary to correct the ovalness. It is also referred to as the astigmatism of the eye. ...Read moreSee 1 more doctor answer
What does cylindrical power actually means? And what is the best laser vision correction of today?
What does a sphere number of +0.50 and cylinder number of -0.25 mean (axis 179 degrees) (left eye is +0.25, -0.25, 14 degrees respectively)?
Eyeglass powers: These are small numbers and probably means the vision of this person is good without glasses. The first number (sphere) is whether a magnifying or minifying lens is needed. The cylinder is the amount of ovalness and the axis is the orientation of the oval (vertical is 90 degrees and horizontal 180 degrees and other numbers are in between). ...Read more
Can you please explain what this eye prescription means? 0.D. Cylinder -0.25 axis 90 o.S -0.50 axis 75?
My daughter's eye prescription is od -3.00 sphere +2.00 cylinder 110 aaxis and os -6.00 sphere +2.50 cylinder 30 axis what does this mean?
OD is right eye,: OS is left eye. The first #s. sphere, are negative, meaning she is nearsighted. The second #s (cylinder) is the amount of astigmatism that is present. Since astigmatism means the eye is focusing light at an angle, astigmatism comes with a rotation axis. The cylinder is rotated to this axis so that the light can be focused straight on. ...Read more
My eyesight is -4 with cylinderical -1. Can it be made 20/20 by any mean. How poor eyesight can lead to blindness?
Should be ...: Correctable with glasses or contact lenses, or even laser eye surgery. If not correctable then there are other things going on the prevent this like a cataract or retina abnormalities. You need a good pomprehensive eye exam, this will determine what is going on with your eyes. ...Read more
Oxygen Therapy: Oxygen is most commonly delivered by flow rates such as liters per minute (l/min). Each l/min adds approximately 3% to the percentage of air that is oxygen. For example, at 2l/min the patient is receiving 6% additional oxygen. Normally, the ambient air is 21% oxygen, so this patient would be receiving 6+21 or 27% oxygen. ...Read more
I have right sphere -2.50 cylinder -1.50 axis 15. Left sphere -2.75 cylinder -1.75 axis 150. Can i wear contacts? And do I need special contacts
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