❶ How To Choose Contact Lenses

Contact lenses are small optical instruments that are placed directly on the eyeball. Lenses differ in size, thickness, chemical composition, quality, oxygen permeability, etc. Location: Location: When choosing contact lenses, you should consider the need to wear them - they can be cosmetic (change or enhance eye color) or medical (increase visual acuity). Lenses can be conventional and replaceable. Traditional lenses last for several months and must be regularly cleaned in a special liquid to remove dust particles, cosmetics, etc. Replaceable lenses are changed once or twice a month, the waste vapor is simply thrown away.

You cannot choose contact lenses on your own, you need to consult an ophthalmologist. The specialist will determine the type and degree of visual impairment, help you choose lenses in accordance with your age, health condition and wishes. There are several contraindications for wearing lenses, so consultation is necessary. They cannot be worn if there are allergic diseases, glaucoma, diseases of the lacrimal apparatus, various inflammatory processes, strabismus, etc.

Undergo computer diagnostics for lens fitting. It is important not only to determine their type of contact, but also to try them on, evaluating their feelings. At first, you may be bothered by headaches and a feeling of nausea, but if you experience pain in the eyes, even a slight one, then the lenses should be changed.

Fitting lenses includes a selection of attachments with a comfortable "fit". They should not block the free access of tear fluid. A comfortable fit means good mobility and a fluid space between the lens and the eyeball that is filled with tear fluid. If the lens fits tightly, then the tears will not wash the cornea. Individual selection takes into account the shape and structure of the eye, the tolerance of specific materials.

When choosing contact lenses, you must have basic information about indicators of visual impairment. It is worth knowing the refractive power (D) and the base curvature of the cornea (BC). You also need to know the diameter of the contact lens (DIA). Find these designations on the packaging and check the figures with your data. Additional functions of contact lenses are also indicated on the packaging - a sun-shaped icon indicates the presence of protection against ultraviolet rays, an hourglass with a figure indicates the product's shelf life (which is counted from the moment the box is opened).