COS EXTERNAL PARTNERS
![](https://www.herbort-cos.ch/wp-content/uploads/2021/01/herbort-cos-site-partnership.png)
Dr Christian de Courten: anterior segment surgery and refractive surgery
Dr Johannes Fleischhauer: retinal surgery, retinal detachment, vitrectomy
Dr Danielle Marie-Anne: eyelid surgery
Dr Van Tao Tran: ultrasonography
Prof. François Spertini: internal medicine, immunology-allergology
Prof. André Mermoud: glaucoma surgery