OVD Characteristics

Visco Elastics Should Possess CCD

The Rheologic characteristics:

·         Viscosity (reflects a solution's resistance to flow, which is in part a function of the molecular weight of the substance)

·         Elasticity (Elasticity refers to the ability of a solution to return to its original shape after being stressed)

·         Surface tension

·         Pseudoplasticity = rheofluidity (refers to a solution's ability to transform when under pressure, from a gel-like substance to a more liquid substance)

·         Coatability: It measures the adhesion capacity of OVDs. It is inversely proportional to surface tension and the contact angle between the OVD and a solid material.

·         Cohesiveness: Cohesiveness is the degree to which material adheres to itself.

·         Dispersiveness: It is the tendency of a material to disperse when injected into the anterior chamber.