Research recommendation(s) from an individual piece of guidance Guidance: Microinvasive subconjunctival insertion of a trans-scleral gelatin stent for primary open-angle glaucoma Date issued: 25 April 2018 Research recommendations coming out of this guidance NICE encourages further research into microinvasive subconjunctival insertion of a trans-scleral gelatin stent for primary open-angle glaucoma, including randomised studies. Further research should include details of patient selection and long-term outcomes.