The Dry Eye Zone

Rebecca's Blog


Study: NovaTears helps symptoms, not signs, in oGvHD

NovaTears is an eye drop available in Europe.

The bottom line for GvHD patients on 4x daily NovaTears in this study:

No clinical, change, but a little over half of patients felt better. (Need I say, feeling better is good….) 1 out of 23 patients had an adverse reaction.

Semifluorinated Alkane Eye Drops in Chronic Ocular Graft-versus-Host Disease: A Prospective, Multicenter, Noninterventional Study. Eberwein et al, Ophthalmic Res. 2019 May 22:1-9



Ocular graft-versus-host disease (oGvHD) following allogeneic hematopoietic stem cell transplantation develops as severe dry eye disease (DED) and is initially treated with lubricants, although no clinical trials are available using artificial tears in oGvHD. This trial was set up to test perfluorohexyloctane (NovaTears®) as nonpreserved layer-forming agent for the treatment of DED in oGvHD.


25 patients with severe DED due to oGvHD received 1 drop perfluorohexyloctane 4 times daily during a prospective, multicenter, observational 12-week study on top of established topical therapy. Clinical parameters included Schirmer test, tear film breakup time, corneal staining, meibum secretion and ocular surface disease index. Adverse events, visual acuity and intraocular pressure were key safety parameters.


From 25 patients recruited, 23 presented for the second visit. Perfluorohexyloctane treatment did not lead to any changes in clinical or safety parameters but led to fast relief in symptoms in 57% of the patients. One adverse reaction occurred.


This study showed no change in clinical signs in severe DED due to oGvHD, which was not unexpected due to the underlying pathomechanisms. However, the study showed improvement of symptoms in individual patients allowing application of perfluorohexyloctane as an additional symptomatic therapy in oGvHD.