Abstract: A subconjunctival injection apparatus for administering a pharmacological agent formulation to a subconjunctival compartment of an eye, the apparatus including a jet injector having force generating means that is adapted to generate sufficient force to expel the pharmacological agent formulation from the jet injector and through the conjunctiva. In one embodiment of the invention, the jet injector comprises a needleless jet injector. In one embodiment, the needleless jet injector provides a delivery pressure in the range of approximately 100-1000 psi.

Abstract: An intravitreal injection device for administering a pharmacological agent formulation to an intravitreal compartment of an eye, comprising (i) a nozzle member having an internal formulation chamber that is adapted to receive and contain the pharmacological agent formulation therein, (ii) a microneedle having a first end that is in communication with the nozzle member and a second ejection end, (iii) and piercing depth limiter means for limiting the penetration depth of the microneedle into the eye, the microneedle piercing depth limiter means including guide means for positioning the limiter means and guiding the microneedle.