Whether for convenience or aesthetics, many nearsighted individuals choose contact lenses. However, some purchase them carelessly and use them without caution, ultimately damaging their eyes and even causing permanent vision impairment.In fact, contact lenses are medical devices, not ordinary commodities. When wearing them, pay close attention to the following aspects:
Special Requirements for Lens Prescription
Experts explain that contact lens prescriptions differ from those for eyeglasses, with a conversion formula between the two. Typically, nearsighted individuals require a lower prescription for contact lenses than for eyeglasses, with the reduction increasing as the degree of nearsightedness rises.Conversely, those with hyperopia (farsightedness) require slightly stronger prescription in contact lenses than in eyeglasses.
Wellness
Curvature and diameter vary by individual
Since each person's eye curvature and size differ, it's crucial to measure corneal curvature when purchasing contact lenses. Select lenses with appropriate curvature and diameter based on your corneal curvature and diameter.
Health Tips
Selecting Lens Thickness and Water Content
Some individuals already experience frequent eye strain and are prone to dry eye syndrome, which can worsen with contact lens wear. Their tear film dries easily, with rapid evaporation and absorption. In such cases, lenses with lower water content and medium thickness should be chosen to minimize moisture loss from the eyes.
Health Care
Material Requirements Vary
Eyes require oxygen; oxygen deprivation can cause complications like dryness and redness. Contact lenses act as a barrier to oxygen flow, with thicker lenses blocking more effectively. Those with higher prescriptions often require thicker lenses, making it even more crucial to choose materials with excellent oxygen permeability.
Health Tips
Three Key Points to Prevent Infection
Source: Contact lenses must come from safe, quality-assured sources. Never use lenses worn by others or expired lenses, as this greatly increases the risk of corneal infection. Corneal infections can cause vision loss in mild cases and blindness in severe cases.
Environment: Remove lenses in prohibited settings like beauty treatments, swimming, or showering to prevent eye infections or damage.
Care: Failure to clean and disinfect lenses promptly allows bacteria to thrive. When immunity is low, pathogens may enter through microscopic eye abrasions and infect the cornea.