How old is Xiao Yang, the mechanic?

20 years old. Recently, under the treatment of Kunming Conterson Eye Hospital, the repairman Xiao Yang (pseudonym) was discharged after his vision recovered. Xiao Yang, who is in his twenties this year, works in a garage. On the eve of Mid-Autumn Festival, when I was repairing the car and tapping the bearing with a hammer, I suddenly felt something splash on my left eye. Suddenly I feel that I can't see clearly in my left eye, but it doesn't hurt too much. Subsequently, the left eye was so red and swollen that I couldn't open my eyes. Colleagues saw it and sent Xiao Yang to the local health center for examination. The doctor washed his injured eyes with normal saline, but his eyes became more and more painful, and he could not even see clearly. After returning home, the family turned around and sent Xiao Yang to Kunming Conterson Eye Hospital. After careful examination by the doctor, it turned out that iron filings splashed into the left eyeball and punctured the cornea. Because this piece of iron filings is just embedded in the crystal, and it is seriously infected and suppurated, resulting in redness and blindness in the eyes.