Ert- Physics Essay Example

refractive procedures, as well as vision therapy for individuals experiencing nearsightedness due to stress. Eyeglasses are commonly used to correct Myopia; however, some individuals choose contact lenses as they provide a broader perspective on life. Contact lenses are placed directly on the eye and require regular cleaning and maintenance in order to maintain eye health.

There are different ways to treat myopia by reshaping the cornea. One method is Orthokeratology, where a series of rigid contact lenses are worn daily for specific periods. Laser procedures like Photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) are also options. PRK uses a laser to change the shape of the cornea by removing a thin layer of tissue from its surface, adjusting incoming light. However, there are limits on how much tissue can be safely removed, determining the level at which nearsightedness can be corrected.

LASIK surgery is a technique that involves cutting and folding back a section of the outer corneal surface to remove tissue from the inner layers of the cornea. The eye is then reshaped with a laser by precisely removing the necessary amount of tissue, after which the outer tissue flap is placed back in position for healing. The ability to correct vision using LASIK depends on how much corneal tissue can be safely removed. Hyperopia, also known as farsightedness, can be treated through different methods such as eyeglasses, contact lenses, and refractive surgeries like Laser-assisted subepithelial keratomileusis (LASEK) and Conductive Keratoplasty (CK). LASEK involves folding back a thin layer of the cornea to minimize damage and is suitable for individuals involved in sports or at risk of eye injuries. This procedure uses

radiofrequency energy to apply heat to specific areas on the cornea.

The radiofrequency's impact is similar to heating and stretching a plastic wrap. The curvature alteration of the cornea depends on spot spacing, quantity, and post-procedure healing. CK outcomes differ among individuals. Both Myopia and Hyperopia are effectively corrected by eyeglasses and contact lenses. However, the success rates of laser eye surgery are uncertain, with varying results. Treatment complications may arise.

A study published in the Archives of Ophthalmology found that LASIK and PRK surgeries have no long-term harmful effects on the cornea. The study observed 29 myopic patients who had undergone these surgeries, and after 9 years, no abnormal changes were detected. Although there was a slight decrease in endothelial cell density (5.3%), this is a normal decline that even occurs in individuals without refractive procedures. Far-sighted patients were not included in the study; however, researchers believe that the findings would likely be comparable for them too.