An intraocular lens, IOL, folding device comprising: a housing; a pair of IOL storage shelves disposed within opposite sides of the housing, each IOL storage shelf adapted to support a portion of an unfolded IOL; an IOL folding channel formed between the IOL storage shelves, each IOL storage shelf coupled to the IOL folding channel by a lip, the IOL folding channel having a longitudinal axis adapted to be aligned with a bore of an IOL injector, and having a bottom surface forming a floor; an IOL folding guide axially aligned and above the IOL folding channel, the IOL folding guide having a first end adapted to contact an upper surface of an IOL and a second end coupled to the housing or a user-actuatable handle, the user-actuatable handle having a first end (6, 7) accessible to a user and a second end coupled to the IOL folding guide or the IOL folding channel; and wherein, in response to actuation of the lever or button: the floor of the IOL folding channel and the IOL folding guide are adapted to be brought closer together, the IOL folding guide thereby configured to push an unfolded IOL into the IOL folding channel and adopt a folded conformation within the IOL folding channel, wherein: the IOL folding channel is disposed within a block, the block coupled to and slidably movable within the housing; the user-actuatable handle comprises a lever having a first end accessible to a user and a second end coupled to the block; and the IOL folding device further comprising a spring having a first end coupled to the block and a second end coupled to the housing; wherein in response to actuation of the lever: the block is adapted to move from a resting position wherein the channel is aligned with the bore, such that the floor of the IOL folding channel moves towards the IOL folding guide, thereby pushing the IOL into the IOL folding channel; and the spring is adapted to return the block to the resting position. a housing; a pair of IOL storage shelves disposed within opposite sides of the housing, each IOL storage shelf adapted to support a portion of an unfolded IOL; an IOL folding channel formed between the IOL storage shelves, each IOL storage shelf coupled to the IOL folding channel by a lip, the IOL folding channel having a longitudinal axis adapted to be aligned with a bore of an IOL injector, and having a bottom surface forming a floor; an IOL folding guide axially aligned and above the IOL folding channel, the IOL folding guide having a first end adapted to contact an upper surface of an IOL and a second end coupled to the housing or a user-actuatable handle, the user-actuatable handle having a first end (6, 7) accessible to a user and a second end coupled to the IOL folding guide or the IOL folding channel; and wherein, in response to actuation of the lever or button: the floor of the IOL folding channel and the IOL folding guide are adapted to be brought closer together, the IOL folding guide thereby configured to push an unfolded IOL into the IOL folding channel and adopt a folded conformation within the IOL folding channel, wherein: the floor of the IOL folding channel and the IOL folding guide are adapted to be brought closer together, the IOL folding guide thereby configured to push an unfolded IOL into the IOL folding channel and adopt a folded conformation within the IOL folding channel, wherein: the IOL folding channel is disposed within a block, the block coupled to and slidably movable within the housing; the user-actuatable handle comprises a lever having a first end accessible to a user and a second end coupled to the block; and the IOL folding device further comprising a spring having a first end coupled to the block and a second end coupled to the housing; wherein in response to actuation of the lever: the block is adapted to move from a resting position wherein the channel is aligned with the bore, such that the floor of the IOL folding channel moves towards the IOL folding guide, thereby pushing the IOL into the IOL folding channel; and the spring is adapted to return the block to the resting position. the block is adapted to move from a resting position wherein the channel is aligned with the bore, such that the floor of the IOL folding channel moves towards the IOL folding guide, thereby pushing the IOL into the IOL folding channel; and the spring is adapted to return the block to the resting position.