Mechanical Properties of Contact Lens Materials | 合法醫療器材資訊網

由EKim著作·2018·被引用26次—Themechanicalpropertiesofcommonlyprescribedsoftcontactlensmaterialsweremeasuredusingadedicatedinstrument.Itsreliabilitywasdemonstrated, ...

Objectives: To evaluate the mechanical properties of commonly available soft contact lens materials and compare results using custom-built MicroTensometer.

Methods: The Young modulus, parameters for stress relaxation, and toughness of 18 types of single vision soft contact lenses were measured using custom-built MicroTensometer. Five lenses of each type were soaked in standard phosphate buffered saline and measured at a temperature of 35°C. Each lens was flattened and sliced into a rectangular strip sample using two parallel blades.

Results: The Acuvue Moist 1-Day and SofLens Daily lenses measured lowest moduli, whereas Air Optix Night & Day Aqua and Premio measured the highest. The measured moduli for silicone hydrogel materials were generally higher compared with the hydrogels except for Dailies AquaComfort Plus. The exponential curve fitted over the decay in stress showed a consi...