To provide eyedrops for treating or preventing epithelial injury in the palpebral conjunctiva margin, said eyedrops imparting sufficient lubricity to the corneal surface or the surface of a soft contact lens. The present invention has been completed by finding that the above problem can be solved by eyedrops which contain a copolymer at a specific ratio, said copolymer having a structure comprising three kinds of constitution units which are different from each other at a specific ratio.本發明提供一種對角膜表面或軟式隱形眼鏡表面賦予充分的潤滑性的、用於瞼結膜緣上皮障礙的治療或預防的滴眼劑。發現藉由以特定比例含有如下共聚物的滴眼劑，該共聚物具有以特定比例含有3種不同結構單元的特定結構，可解決所述技術問題，以至完成本發明。
