Other surgeries like laser surgeries are also in vogue these days which id done for people who are above 21 years of age! These days high quality contact lenses are also used for cosmetic purposes since most of them do not prefer wearing spectacles in public due to beauty reasons. it does not change once the person reaches 18 years of age. This type of defective eye sight is observed in children or young age people. Spectacles are used for correcting the defective eye sight. The higher number with a negative sign indicates more amount of eye defect i.e. It is usually denoted by the negative sign i.e minus sign or "-"sign. The amount of blurriness indicates the sight of the eye. Short sight : Short sight is an eye defect where a person cannot see the distant objects clearly. The two basic eye defects are Short sight and long sight There are many types of defects for an eye like : And measuring the eye sight that is the defect in your eye, there is a method.
To know anything in detail we need measurement. Toric contact lens is used to correct astigmatismĬontact lens- Advantages, disavantages & precautions to avoid side effects LASIK - Laser eye surgery to reduce glass power -Advantages, cost, side effectsĪnother option to correct such error is contact lens. This surgery is done after completing 18 years of age once spects power stabilizes Various techniques are available- LASIK (laser induced keratomileusis), zyoptics, etc. Surgery to remove spects power is called refractive surgery. So cylinder (either + or -) is placed in front of eye to correct the power in particular axis to give clear image. Axis indicates this meridien where its too steep or too flat. Cornea is either too steep or flat in certain axes. In such people, corneal curvature is not regular in all parts. Myopics may have very high power even up to -20 or -30D while hyperopcs generally have power up to +3 or +4DĬylinder is needed for people who have astigmatism. Myopics have more chances of developing retina problems like retina detachment. Myopia is much more common than hyperopia. Person with myopia can't see far objects clearly. "-" power spects are used to correct myopia sightedness). Person with hyperopia can't see near objects clearly. "+" power spects are used to correct hyperopia (far sightedness). Refractive errors are very common in general public & regular screening of children should be done at schools The lens for the astigmatism patient is made of both sphere and cylindrical combinations.įor more information you can go through the profile of me, where you will find article about the working theory of these glasses. The meaning of axis is that it defines the position of sphere and cylinder. For your left eye which has -1.45 and -140 axis means that you're this eye has minus cylinder notation which means the cylinder power is more divergent then the sphere power. According to this the cylinder power is more convergent then the sphere power.
#Contact lens which is right and left number 3 and 4 plus
Now for your Right eye which has +1.00 for cylinder and +100 axis, which means it have plus cylinder notation. The sphere component is lonely used to treat the near sightedness or long sightedness. In plus cylinder notation which includes two notation one of sphere and other of cylinder.
We have plus cylinder notation and minus cylinder notation. So for curing the problem we use the cylindrical lenses. The two axes are vertical and horizontal. Since you are having numbers in terms of cylinders that means you are suffering from defect called 'Astigmatism' in which the person can't focus on the object clearly because he or she see image in different axis.
/red-eyes-and-contacts-3421657-5bb7c1864cedfd002614a758.png "contact lens which is right and left number 3 and 4")
The above data is used for constructing the lenses suitable for curing the defect in vision.
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