In cases where the surgeon performs Yamane intra-scleral haptic fixation (ISHF) it is recommended that at least a partial anterior vitrectomy is performed and it may be preferable to have a complete pars plana vitrectomy done. This is so that vitreous does not become entangled with the haptics which can cause retinal traction, macular edema, or even a detachment. In this case the anterior hyaloid face is intact and the surgeon is careful to insert the IOL in a planar manner so as to not disturb it. This is possible since the vitreous is quite solid since the patient is very young. The surgery is being performed to address the severe lens subluxation from Marfan syndrome.