Contact lenses, also known as corneal contact lenses, are lenses worn on the cornea of the eye to correct vision or protect the eyes.More and more people are joining the ranks of contact lens wearers. Some nearsighted individuals choose them for daily convenience, while others wear them for aesthetic reasons. However, did you know that improper contact lens use and certain incorrect habits not only fail to give you crystal-clear vision but can actually harm your eyes—the windows to your soul? Are you aware of the potential dangers of wearing contact lenses?
1: Reduced Eye Resistance
Contact lenses prevent the cornea from accessing air, causing oxygen deprivation that triggers a reaction similar to altitude sickness in humans. This impairs normal metabolic function and weakens the eye's defenses.
Expert Advice: Never sleep in your lenses. The cornea is a unique organ without blood vessels, relying on air and surrounding tissues for oxygen exchange.Sleeping with lenses obstructs this process, potentially leading to corneal infections in severe cases!
2: Causes Eye Fatigue and Dry Eye Syndrome
Prolonged contact lens wear often leads to eye fatigue and may trigger dry eye syndrome. Symptoms include eye soreness, itching, a foreign body sensation, excessive eye discharge, dryness, burning, and blurred vision.
Expert advice: When selecting contact lenses, prioritize the water content. Excessively high water content causes lenses to absorb moisture from the eyes, leading to discomfort and dryness. Conversely, too low water content impairs oxygen permeability, also causing dryness because oxygen is transmitted through the lens's water content. Therefore, an ideal water content ranges between 50%-60%.
3. Triggering Eye Allergies
Contact lenses adsorb proteins, lipids, collagen, and other substances from tears, causing them to deposit on the lens surface. This fosters bacterial growth and can lead to corneal edema, corneal neovascularization, and allergic reactions.
Expert Advice: During contact lens use, components from tears, secretions, and external contaminants inevitably adhere to the lens, forming deposits. Even with strict cleaning and maintenance routines, microscopic residues remain invisible to the naked eye and cannot be fully removed. It is recommended to use monthly disposable lenses or lenses with even shorter replacement cycles.
IV: Corneal Abrasion Leading to Irreversible Damage
Contact lenses can abrade the cornea, potentially causing severe consequences like corneal epithelial detachment or perforation. Some lenses have a curvature that mismatches the cornea's shape, causing irregular abrasion and corneal ulcers. This results in irreversible vision loss, and even after treatment, white spots may remain on the cornea.
Expert Advice: Minor scratches on lenses vary in depth. Severe scratches may irritate the eye and damage the corneal surface, necessitating consultation with an ophthalmologist to determine if lens replacement is needed. Superficial scratches on rigid lenses can be polished out, but soft lenses cannot be repaired.
5. Causing Optic Nerve Paralysis
Long-term contact lens wear can numb nerve endings, reducing corneal sensitivity. Many patients develop ulcerative keratitis without noticing.
Expert Advice: Visit a reputable hospital or optometry clinic for a comprehensive examination. Select contact lenses suitable for your eyes and maintain strict eye hygiene to prevent other ocular symptoms. If you experience redness, dryness, pain, light sensitivity, or decreased vision while wearing contact lenses, seek prompt medical attention.
Six: Accelerated Corneal Aging
Starting soft contact lens wear at age 20 can lead to significant corneal endothelial cell loss within five years. Water ingress then easily causes corneal edema. After ten years, endothelial cell density may match that of a 60-year-old, rendering the cornea unsuitable for any ophthalmic surgery—even for cataract correction in later life.For early-stage myopia, prioritize wearing eyeglasses or undergoing laser vision correction surgery. Friendly Tips: Avoid Contact Lenses in These Situations SPA & Hot Springs As temperatures drop, many seek warmth through hot springs or spas. However, avoid wearing contact lenses during such activities.Because contact lenses contain moisture, high temperatures can cause dehydration, leading to lenses sticking to the eye and becoming difficult to remove. This can also cause adverse effects. Swimming, after applying makeup Contact lenses should not be worn during these activities. Women during their menstrual period and pregnant women are advised to avoid wearing contact lenses.If you must wear contact lenses, besides ensuring daily cleaning and removing them before sleep, minimize wear time. Reduce contact lens use while using computers.Prolonged computer use already reduces natural tear production, and wearing contact lenses exacerbates this issue. Without good hygiene habits, this increases the risk of keratitis, corneal ulcers, and in severe cases, eyelid spasms, ultimately affecting vision.