Fig. 5
From: Migration of rigid gas permeable contact lens into the upper eyelid after trauma: a case report
Schema of the sagittal section of the orbit. The upper conjunctival sac curves superoposteriorly along the sclera. During eyelid closure, the upper edge of a rigid gas permeable (RGP) contact lens is located below the palpebral conjunctiva, superior to the upper tarsus (asterisk). When the lens is pushed upwardly (yellow arrow) by trauma, the upper edge penetrates the palpebral conjunctiva, superior to the upper tarsus