?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=He&rft.aufirst=M&rft.au=He%2C+M&rft.pages=1609-1618&rft.volume=393&rft.atitle=Laser+peripheral+iridotomy+for+the+prevention+of+angle+closure%3A+a+single-centre%2C+randomised+controlled+trial&rft.title=The+Lancet&rft.issue=10181&rft.date=20+April+2019&rft.issn=1474-547X&rft.genre=article