Refers to: Re: Lindén et al.: Normal-tension glaucoma has normal intracranial pressure: a prospective study of intracranial pressure and intraocular pressure in different body positions (Ophthalmology. 2018;125:361-368)Ophthalmology, Volume 125, Issue 10, October 2018, Pages e74Xiangxiang Liu, Diya Yang, Yiquan Yang, Hanruo Liu, Xiaoxia Li, Yuan Xie, Ningli Wang. DOI: 10.1016/j.ophtha.2018.04.027