Taking alectinib may cause blurring of the eyes, and visual disturbances are a common adverse effect of alectinib. Visual disturbances include include blurred vision, impaired visual acuity, fugue, decreased visual acuity, visual fatigue, and diplopia. When blurring of the eyes occurs, stop the medication immediately and seek medical attention. Aleitinib is a targeted drug for the treatment of non-small cell lung cancer and can cause adverse reactions such as rash as well as visual disturbances. A patient experiencing blurry eyes may be an adverse reaction to the medication, or it may simply be caused by improper eye use. If it is an adverse reaction to aleitinib, you need to stop the drug immediately and seek medical attention as soon as possible for professional treatment. If the blurring of the eyes is caused by improper use of the eyes, it can be recovered after rest, and at the same time, you should correct the bad eye habits and pay attention to the protection of the eyes. It is important to note that the medication should be administered under the supervision of a doctor, and any adverse reactions should be discontinued and medical attention sought.