SPH indicates the adjustment for spherical power, with a prismatic correction of 0.5 Base Up. The prescription will have another similar listing starting with OD for the right eye.
Before we jump into what each section means, as a general rule, the higher the numbers on your prescription, the worse your eyesight is and the stronger your prescription will be to provide the necessary correction. Mild: -0.50 to -3. Moderate: -3.25 to -5.00. High: -5.25 to -10.
What does it mean when your eye test says 0.50 in each eye? A 0.50 measurement is extremely mild, whether the sphere, cylinder or axis figure. If found in the cylinder or axis, this indicates a mild correction for astigmatism. The larger the measurement, the higher the correction needed.
If the number is negative (–), it means it is correcting nearsightedness. If the number is positive (+), it is correcting farsightedness. A number between +/-. 025 to +/-2.00 is considered mild, a number between +/-2.25 to +/- 5.00 is considered moderate, and a number greater than +/- 5.00 is considered severe.
-0.50 D cylinder for the correction of astigmatism. A cylinder power with an axis at the 180 meridian. This means that the horizontal (180-degree) meridian of the eye has no added power for astigmatism and the vertical (90-degree) meridian gets the added -0.50 D from the cylinder column.
If your number is between +0.25 and +2.00, you have mild farsightedness. If your number is between +2.25 and +5.00, you have moderate farsightedness. If your number is greater than +5.00, you have high farsightedness.
Astigmatism is measured in diopters. A perfect eye with no astigmatism has 0 diopters. Most people have between 0.5 to 0.75 diopters of astigmatism. People with a measurement of 1.5 or more typically need contacts or eyeglasses to have clear vision.
An SPH number indicates if you are farsighted or nearsighted. If the SPH value is 0.00, or noted by Plano, Pl, or an infinity sign, you do not have a vision distance problem. Typical SPH numbers range between 0.00 and +/- 20.00.
The amount of astigmatism (visual distortion) that is caused by an irregularly shaped cornea. If this box is empty, it means that there is no astigmatism and your eyes are perfectly spherical. A low number like 0.25 means your eyes are not quite round and a higher number like 3.00 means your eyes are quite oval.
Sph (sphere)
A plus (+) indicates that you are long-sighted, which means objects close to you are difficult to see without your glasses. A minus (-) indicates that you are short-sighted, which means you have difficulty seeing objects further away without your glasses.
+0.50 reading glasses come in a variety of shapes, sizes,color options, and available in fully magnified clear lenses and reading sunglasses,which prefect for the perpetual and occasional reader.
The eyesight of 0.5 diopters is sometimes curable (only in a few cases) through a balanced diet, eye exercises, and a healthy lifestyle. However, there is no guarantee that these methods will be effective to reverse the refractive power. You will most likely need spectacles or contact lenses to see clearly.
Cylinder (CYL)
You will observe (-) CYL values for short-sighted astigmatism e.g. -0.50 or -1.25. These lenses will be cylindrical on the inside surface (closest to your eye). You will see (+) CYL values for far-sighted astigmatism e.g. +0.75 or +1.25.
A prescription of -0.50 in each eye means you have a mild nearsightedness (myopia) that requires correction to improve your distance vision.
The lowest strength is usually 1.00 diopters. Glasses go up in strength by factors of . 25 (1.50, 1.75, 2.00). The strongest glasses are 4.00 diopters.
If your eye prescription is between 0.75 to 3, both positive and negative, it means you have a mild eyesight defect. You will need to wear glasses for most of the tasks.
You have to wear them all the time except sleeping.. If you don't want to wear you can use contact lenses or go for lasik surgery you need to wear spectacles at all... Was this answer helpful?
Sph (sphere) represents how long or short sighted you are. This can be positive (+) for long sight or negative (-) for short sight. The higher the number, the stronger your lens.
SPH, or sphere, is the amount of lens power needed to correct nearsightedness or farsightedness, whereas CYL, or cylinder, is the amount of lens power needed to correct astigmatism. When people talk about their eye degree or “power,” they are usually referring to their SPH value.
The sphere number on your prescription indicates the strength of the lenses needed to correct your vision. The number is “spherical” because it is equal in both meridians of each eye.
With -0.50 and -0.75, you should be able to pass the driver test. You will pass the driver even with -1.00, so you shouldn't worry. Small refractive errors like -0.25 and -1.00 are negligible, even the distance vision isn't blurry enough for you to need glasses. Most people will need them, however, at -1.25 or -1.50.
Glasses or contacts can correct almost all cases of astigmatism. But if you have only a slight astigmatism and no other vision problems, you may not need them. If you have a common level of astigmatism, you'll probably have corrective lenses, like glasses or contacts, or surgery.
Astigmatism occurs when the cornea has an irregular shape. A normal cornea is shaped like the surface of a basketball, a round surface. A cornea in an eye with astigmatism is shaped like a football, or like the back surface of a spoon.
Between . 75 and 2 diopters is considered mild astigmatism. Between 2 and 4 diopters is moderate astigmatism, and 4 or more diopters is considered significant or “bad” astigmatism.
What Level of Astigmatism Requires Glasses? You'll likely need glasses if your astigmatism has a strength of 1.0 or more. But even if your astigmatism needs less than 1.0 diopters of correction, it doesn't mean you won't need glasses.