Comparative Study On Haptic Adhesion Of Hydrophobic Acrylic Intraocular Lens With Different Designs

Objective: To compare the adhesion between the optic and haptic of the hydrophobic acrylic intraocular lens with different designs.Methods: Four IOLs were selected,and fold their haptic on the center of the optic at standard room temperature(25?)with or without visco.Apply a force in the range of0.02N-0.7N with each interval is 0.02 N.Observe and record the separation time between the haptic and the optic under the microscope,which is the adhesion-separation time.Compare the adhesion-separation time of IOL in different stress states,and the time of adhesion separation and the change of stress were analyzed by linear regression.The viscosity relationship of IOLs would be obtained by slope comparison.Results: At room temperature without visco,the adhesion-separation time of Lucia 601P?Tecnis ZCB00?IQ SN60 WF between haptic and optic is more than 200 seconds.While under the same external force condition,the adhesion-separation time of HOYA iSert?251 IOL was significantly lower than the other three groups,and the difference was statistically significant;At room temperature with visco,four kinds of IOLs' haptic and optic can produce haptic adhesion under external force,with the adhesion-separation time increasing with the increase of the force,and there is a linear relationship between adhesion-separation time and force(P<0.01).The relationship between each adhesion(slope)is: HOYA iSert?251?Tecnis ZCB00?IQ SN60WF?Lucia 601 P.Conclusion: The adhesion and separation between the haptic and the optic appears in the hydrophobic acrylate intraocular lens,and adhesion time reduces when visco is added.The design of the blue PMMA chemically bonded haptics tips reduces the adhesion between IOL's haptic and optic.