Comprehensive Review of the Literature on Existing Punctal Plugs for the Management of Dry Eye Disease

Table 1

Shapes of punctal plugs. Several designs are made by different companies to increase the effectiveness of punctal plugs with different shapes of the shafts, collapsible noses, reservoirs, and traction ribs.

Design	Advantages	Name	Model
Tapered shaft	Designs extra force horizontally to keep plug in place.	EaglePlug
		TearSaver
		SuperEagle Plug
Collapsible nose	Collapsible hollow nose adheres the plug to the shape of ampulla and springs open once inside the puncta.	Parasol Punctal Occluder
Reservoired head	Indentations trap tears and minimize foreign body sensation.	LacriPro
		Quintess Punctal Occluder
Ribbed shaft	Greater flexibility.	EagleFlex Plug
		SuperFlex
Perforated shaft	Slanted; collarette; perforated lumen.	Soft Plug Flow Control
		Eagle Flow Control
		EaglePlug TearFlow
		Microflow
		Perforated punctal plug
Slanted lip	Resists migration and prevents rubout. Conforms to the natural anatomy of eyelid.	Ready-Set
Dual lobe tip	Fits a range of punctal sizes.	Plug 1
Stretched shaft	Returns to natural shape after insertion.	Snug Plug
Straight shaft	Low profile dome and easy; insertion.	VeraPlug
		Parasol Punctal Occluder
		Soft Plug
		UltraPlug