Hello, I want to ask, is that 1.5 minus minus 150 °?
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Eyes that appear blurry to see distant objects can be caused by refractive abnormalities, namely myopia / nearsightedness or also referred to as minus eye. Myopia occurs if the sharp vision / vision decreases, because the eyeball is too wide or a large corneal curvature so that the shadow of the object in the eye does not exactly fall diretina. This will cause distant objects appear blurry. Other symptoms that are often complained of nearsightedness include headaches, especially pain / aches around the eyes, nausea, vomiting, tired eyes, neck pain, etc.
The severity of refractive disorders is measured by diopters (D). The severity of nearsightedness is divided into mild myopia (0.5 - 3 D), moderate myopia (3-6 D) and high myopia (above 6D).
-1.5 D is certainly different from 150 °. Unit of degree is generally carried out in correction of eyes with abnormalities of astigmatism or cylindrical eyes. Astigmatism results from the curvature of the uneven surface of the cornea. Handling of the cylindrical eye requires an axis in degrees so that parts of the cornea that have different curvature can be corrected properly through the appropriate tilt angle. Determination of the degree of magnitude of the axis of astigmatism is done by the method of arc drawing during eye examination, which is a row of black lines resembling a fan with units of 0 ° to 180 °.
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