An ophthalmic delivery device includes a body defining a fluid reservoir
and a pump in fluid communication with the reservoir. The delivery device
also includes a nozzle that includes a dosage chamber for holding a
dosage of fluid, a valve seat, and a valve cover. The valve cover extends
about the valve seat and forms an interface therebetween and the valve
seat includes an outlet aperture. The interface is in fluid communication
with the outlet aperture and the dosage chamber, and at least part of the
valve cover is movable between (i) a closed position with the valve cover
engaging the valve seat to close the interface and form a fluid-tight
seal therebetween, and (ii) an open position with at least part of the
valve cover spaced away from the valve seat in response to fluid flowing
through the outlet aperture at a pressure greater than a valve opening
pressure to allow the passage of pressurized fluid therebetween. The
valve seat and the valve cover are dimensioned to dispense the dosage of
fluid through the interface at a velocity of equal to or less than 6
meters per second.