'There are two types: eye drops with preservatives and preservative-free eye drops. Eye drops that contain preservatives have a longer shelf life. The preservatives are chemicals that prevent bacteria from growing. This allows you to use one bottle of eye drops for a length of time.
“有两种类型:含有防腐剂的眼药水和不含防腐剂的眼药水。含有防腐剂的眼药水保质期更长。防腐剂是防止细菌滋生的化学物质。这可以让你长时间使用一瓶眼药水。”
'However, the preservatives in OTC eye drops cause eye irritation to become worse. Eye specialists typically recommend that you use this type of eye drop no more than four times a day.' Preservative-free eye drops are best for those with sensitive eyes.
“但是,非处方眼药水中的防腐剂会加重眼部刺激。眼科专家通常建议这种眼药水使用一天不要超过四次。”不含防腐剂的眼药水适合眼睛敏感的人。
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