Plungerless aspiration and/or injection device and method using the same

A method of using a plungerless aspiration and/or injection device, said method comprising the steps of:

• providing a plungerless aspiration and/or injection device that includes:
• a housing, the housing including an end portion extending outwardly from the housing, the end portion having an outer edge that is configured to be pressed against a body portion of a patient;
• a needle portion disposed in the housing, the needle portion including a needle tip, and the needle tip configured to be extended beyond the outer edge of the end portion of the housing;
• and
• a bulb portion disposed in the housing, the bulb portion defining a fluid containing cavity that is fluidly coupled to the needle portion, and the bulb portion being elastically deformable so that the user is able to perform aspiration, injection, and/or implantation on the patient by manipulating the bulb portion;
• filling the fluid containing cavity of the bulb portion with non-toxic dark nanoparticles or microparticles;
• pressing the outer edge of the end portion of the housing against the body portion of the patient prior to insertion of the needle tip of the needle portion into the body portion of the patient so as to reduce a pain sensation of the patient resulting from the insertion of the needle tip of the needle portion;
• and
• compressing the bulb portion of the plungerless aspiration and/or injection device to inject the non-toxic dark nanoparticles or microparticles inside a desired part of a central cornea of the patient so as to create a 1-3 mm diameter darkened annular area, while leaving a 1-2 mm diameter central transparent area for light to pass through the central transparent area, which functions as a pinhole to treat presbyopia, myopia, and reduce astigmatic aberrations of the cornea.

A plungerless aspiration and/or injection device, comprising:

• a housing, the housing including an end portion extending outwardly from the housing, the end portion having an outer edge that is configured to be pressed against a body portion of a patient, and the housing further including a graded flexible guard that indicates the amount of a fluid or medication that is injected in a body cavity;
• a needle portion disposed in the housing, the needle portion including a needle tip, and the needle tip configured to be extended beyond the outer edge of the end portion of the housing;
• and
• a bulb portion disposed in the housing, the bulb portion defining a fluid containing cavity that is fluidly coupled to the needle portion, and the bulb portion being elastically deformable so that the user is able to perform aspiration, injection, and/or implantation on the patient by manipulating the bulb portion;
• wherein the outer edge of the end portion of the housing is configured to be pressed against the body portion of the patient prior to insertion of the needle tip of the needle portion into the body portion of the patient so as to reduce a pain sensation of the patient resulting from the insertion of the needle tip of the needle portion.