<unk> , according to a 2013 paper by Harminder Singh<unk> 's group at the University of Nottingham, is a<unk>  of the cornea that had not been detected previously. It is hypothetically thick, the fourth caudal<unk> , and located between the corneal stroma and Descemet's membrane. Despite its thinness, the<unk>  is very strong and impervious to air. It is strong enough to withstand up to 2 bars (200 kPa) of pressure. While some scientists welcomed the announcement, other scientists cautioned that time was needed for other researchers to confirm the discovery and its significance. Others have met the claim "with incredulity".
Dua's layer
Huxley's layer
Malpighian layer
Bruch's membrane
Fibrous cap
Episcleral layer
Ganglion cell layer
External lamina