The 25-year-old Ms. Han often wear contact lenses because of their needs. Eye redness, dryness and discomfort, for personal use chloramphenicol eye drops treatment. Medication a week after the symptoms are not alleviated, but eyes sensitive to light, tearing, foreign body sensation, to see things blurred over the previous. Carefully checked by a
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doctor after doctor found that Ms. Han eyedrops straight into the eyes of wearing contact lenses, contact lens surface visible layer of yellow-white drug particles, some yellow contact lenses, the black surface of the eye rub scars diagnosed as The doctor told her that does not alleviate the symptoms actually worsened due to wear contact lenses eyedropper proposed change to wear glasses during treatment. Ms. Han puzzled: wearing contact lenses can not eyedrops?
On an outpatient basis, we often encounter patients who wear contact lenses to outpatient counseling wearing contact lenses can eyedrops problem now introduce related issues will be doing some.
Contact lenses, also known as contact lenses, hard contact lenses and soft contact lenses two categories. Commonly used to describe the contact lens performance parameters: water content, the amount of oxygen, light transmittance, hardness, ionic charge and adsorption. The ionic charge its adsorption of contact lenses, so we wear contact lenses should be extra vigilant eye drops eye hazards.
Contact lenses having the properties of the ionic charge. We normally wear soft contact lenses more with negative charge, while a lot of eye drops containing a positively charged substance, such drugs with positively charged substances in the contact lenses attract negative charge is easily deposited on the lenses. Some of these sediments was mist-like change of the refractive state of the lens, wearing glasses to see things fuzzy; some granular friction cornea, causing foreign body sensation, and even damage to the cornea, secondary keratitis.
The adsorption properties of contact lenses can also be selectively absorbs some material. Some have to do the following experiment: immersing the contact lens in a concentration of 0.05% to 0.5% of chlorobutanol solution (eye drops used in a preservative), after 120 hours and concentration of chlorobutanol in the lens up to the original 25 ~ 30 times. Similarly, preservatives in eye drops and other harmful substances will be concentrated in the lens and corneal damage. Of course, there are clinical use of such adsorption characteristics, made special contact lenses to treat eye disease, it is another matter. Which will take some eye drops to use the lens coloring (such as rifampicin eye drops), thus affecting the transmittance of the lens and refraction.
In short, wearing contact lenses, eyedrops more harmful effects. Despite a handful of eye drops (such as preservative-free artificial tears) point in time with wearing contact lenses and glasses will not cause harm, but the vast majority of eye drops with wearing contact lenses point in time may cause eye injury. So wear contact lenses need eyedrops, the best
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change in medication during wear glasses.