Spatial Variation In Ciliary Body Morphology And Effect On Haptic Position And Peripheral Vault After Icl Implantation

To investigate the association of local ciliary body morphology with the haptic position and peripheral vault (p-vault).

Eye and ENT Hospital, Fudan University, Shanghai, China

The retrospective observational study included 95 eyes of 59 patients treated with EVO ICL. Ciliary body morphology parameters (ciliary process length [CPL], ciliary sulcus width [CSW], and scleral spur-ciliary process distance [SCD]), the relative position of ICL haptic to the ciliary process, the haptic-related parameters (the final tip point of ICL haptic [ftICL haptic] and lowest point of ICL haptic), and p-vault in the location of each haptic were measured with ultrasound biomicroscopy 3 months after surgery. Factors associated with ftICL haptic and p-vault were evaluated.

The haptics were in the ciliary sulcus, on the anterior angle of the ciliary process, on the ciliary process, and under the ciliary process in 45.5%, 25.4%, 21.8%, and 7.4% of cases, respectively. The p-vault in the inferotemporal quadrant was significantly greater than that in the other three quadrants (all P<0.05). Local SCD, CPL, and CSW were associated with ftICL haptic, whereas local CSW, ftICL haptic, and spherical equivalent were associated with p-vault (all P<0.05).

Local ciliary body morphology was associated with the haptic position and both factors collectively influence the p-vault. To achieve optimal outcomes, local ciliary body morphology should be considered when selecting ICL size and implantation orientation.