Described herein does a sterile protective cover comprise an intracameral therapeutic agent delivery device in the form of a pen-injector comprising a cartridge container for dispensing multiple doses of a medicament, coupled to an actuation assembly within a housing. A needle assembly is coupled to the distal end of the cartridge container, provided with a removable cap received within the housing will be in optional pre-sterile or no-sterile condition. Use of such device for the prevention or treatment of ocular conditions or diseases is also disclosed. A sterile protective cover comprising ophthalmic device, wherein the sterile protective cover is made of plastic, polythene, polyethylene, resin, rubber, polystyrene, polypropylene, polycarbonate, nylon, or combination thereof. More, particularly the present invention relates to a novel ophthalmic device of reduced length and diameter in the form of a pen-injector for precise and controlled delivery of different doses of a therapeutic agent by introducing a unique “Pen grip “for the device. The present invention also depicts a novel ophthalmic device comprising a multimode power on-off button that would also work with a “Pulse mode” to deliver a fixed quantity of medicament and also double up as a speed control to control the rate of injection and might be used with dermal filler.
