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Doctor insights on: What Does Cylindrical 50 Mean

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What does cylindrical power mean?

What does cylindrical power 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 more

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What does -2.5 cylindrical lens power mean?

What does -2.5 cylindrical lens power mean?

Astigmatism: This refers to an ovality of the optical focusing elements of the eye. It is measured by the difference between the steeper and less curved axes and for the prescription mentioned about, that difference is 2.5 diopters which would be incorporated in a corrective lens. ...Read more

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What does cylindrical power actually means? And what is the best laser vision correction of today?

What does cylindrical power actually means? And what is the best laser vision correction of today?

Oval eye: Cylinder power (astigmatism) refers to an ovalness of the eye which must be corrected by a reverse oval in the eyeglasses or contacts. This usually can be corrected with lasik and the machines in use today are fourth generation and quite excellent. ...Read more

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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)?

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

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Can you please explain what this eye prescription means? 0.D. Cylinder -0.25 axis 90 o.S -0.50 axis 75?

Can you please explain what this eye prescription means? 0.D. Cylinder -0.25 axis 90 o.S -0.50 axis 75?

Don't worry: It means that you have an incredibly weak prescription and probably don't even need glasses. ...Read more

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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?

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

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Really bad eye vision(11(spherical), -2.5(cylindrical). Does this mean i need contacts?

Really bad eye vision(11(spherical), -2.5(cylindrical). Does this mean i need contacts?

Vision correction: With that prescription, you need some of correction such as glasses, contacts, or surgery. The glasses will be pretty thick though. ...Read more

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My eyesight is -4 with cylinderical -1. Can it be made 20/20 by any mean. How poor eyesight can lead to blindness?

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

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What do the settings on an oxygen cylinder such as those on oxygen therapy in hospital mean?

What do the settings on an oxygen cylinder such as those on oxygen therapy in hospital mean?

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