Haptic
Pronunciation: HAP-tik
The supporting arms or loops of an intraocular lens that position and stabilize the lens within the eye.
Full Definition
Haptics are the flexible supporting structures that extend from the central optic portion of an intraocular lens (IOL). These arms or loops are designed to center the lens properly within the capsular bag or ciliary sulcus and provide long-term stability. Haptic design varies significantly between IOL types, with materials including PMMA, acrylic, or silicone, and configurations ranging from plate haptics to C-loop or J-loop designs. Proper haptic positioning is crucial for optimal visual outcomes and preventing lens decentration or dislocation.
Usage
Usage note: Plural is 'haptics.' Not to be confused with the general term 'haptic' relating to touch sensation.
In Context
- "The IOL haptic was noted to be outside the capsular bag during routine examination." — Post-operative assessment
- "Single-piece IOLs with integrated haptics show lower rates of decentration." — Research publication