Is it possible to increase myopic refractive error ?!

Question

the sum of my myopic in my eyes are about -10. i need for am examination that this errro in my eyes are -10.5 or more. is there anyway to accomplish this? by the way they use 2 drops in examination that open the eyes completely and use machines to assess the errors in eyes.

Answer 1

In a normal eye, parallel rays of light focus exactly on the fovea (the central area of the macula), when the eye is in a state of rest (i.e., the lens does not have to accommodate). In a farsighted (hyperopic) eye, under the same conditions, the eyeball is too short, and the light rays focus (theoretically) behind the fovea. In a nearsighted (myopic) eye, under the at-rest conditions, the eyeball is too long, and the light rays come to a focus before they reach the fovea. Astigmatism is an irregular curvature of the cornea in one or more of its meridians. The lens may also contribute to astigmatism (as in old age, when it may become somewhat irregular in shape because of cataractous changes). Astigmatism may be simple(i.e., not combined with hyperopia or myopia), or compound; when an eye has both myopia and astigmatism or hyperopia and astigmatism, it is a compound defect. Astigmatism may also be "mixed" (when myopia is combined with hyperopic astigmatism, or when hyperopia is combined with myopic astigmatism). In middle age (beginning anytime past age 40), the lens becomes less flexible and less able to accommodate for nearpoint viewing; this condition is called "presbyopia" and is described as "when arms aren't long enough." In addition to simple myopia or hyperopia and the variations of astigmatism, and because the human organism has two eyes which must have coordinated visual reception for good vision to occur, a multitude of refractive variations are possible. Anisometropia refers to different refractive errors in each eye, and aniseikonia denotes a difference in the image size in the two eyes.

Refractive errors tend to be inherited, but there is no pattern of inheritance. Size of the eyeball, shape of the cornea, shape of the lens, and depth of the anterior chamber are all variables in refractive errors. These variables increase the possible ocular combinations for refractive errors.

Symptoms of myopia include squinting and frowning; hyperopia may cause a lack of interest in reading, rubbing of the eyes, or even headache, dizziness, or nausea. Astigmatism may cause visual fatigue, headaches, frowning, and squinting.

Degenerative myopia (sometimes also called progressive myopia) is similar to simple myopia except that the degenerative changes occur in the optic disk, choroid and retina, sclera, and vitreous, and are not related to the degree of myopia (i.e., the myopia does not increase; the structure of eye parts changes in such a way that visual function is negatively affected). Loss of central vision, retinal detachment, and vitreous opacities are typical; cataracts and secondary glaucoma may be additional complications. Progressive myopia is genetically determined as a recessive trait.

TREATMENT: Myopia and hyperopia are treated by the use of spherical concave and convex lenses, respectively. Astigmatic corrections are cylindrical and are added to any prescription for myopia or hyperopia. Presbyopia necessitates the use of bifocals or trifocals. In the absence of disease or other ocular abnormalities, glasses or contact lenses are the only treatment needed for refractive errors.

IMPLICATIONS: The wearing of glasses does not "strengthen" or "weaken" eyes, or affect the degree and progress of myopia. Eye exercises are of no benefit in improving refractive errors, since they cannot alter the size of the eyeball or the refractive power of the lens.