Eye Drop Assist for Vials

The EDA (eye drop assist) consists of an eyepiece and pliers and allows easy positioning of the eye drop vial (single dose unit; EDO in german) in front of the eye. Long handles in an ergonomic shape allow for easy dosage of pressure on the vial for people with hand mobility problems such as arthritis or sports injuries. Openings on all four sides of the eyepiece simplify correct positioning over the eye.

For convenient handling the eyepiece and pliers are combined in one part.
The eyepiece has a stop for the vial, which makes it easier to position it corrrectly in the tool.
The predecessor with a separate eyepiece is still available as version 1 in the download area.
The toolset was tested with vials such as  “Ofloxacin” or “Tim-Ophtal”.

For use with “Ganfort” vials an additional slider can be mounted.

For the basic shape of the eyepiece I was inspired by
https://www.thingiverse.com/thing:3715276 from “jbergmans”

The prototype was printed with the following slicing parameters:

• material PETG
• layer height = 0.3 mm
• perimeter = 4
• infill grid = 40%
• support required for the eyepiece (paint-on supports)
• nozzle diameter = 0.4 mm
• the slider was printed with layer height = 0.2mm, perimeter = 3 and infill grid=30%

remark: If the part is ordered from a 3D printing service that does not allow detailed parameter setting for perimeter, infill = 100% should be selected instead.

Assembly instructions:

• Two cylinder head screws M3x12 required
• Clear the throughholes in the middle (blue) and eyepiece part (red) with a drillbit 3.0 mm
  Clear the holes in the upper part (yellow) with a drillbit 2.5 mm
• Align the screws exactly vertically and turn them directly into plastics of the upper part for some turns (not complete) to preform the thread. 
• Remove the screws and screw the three parts together as shown in the picture
• The connection functions like a self-locking nut and should not be reopened unnecessarily
• Alternatively you can use longer screws M3x16 and self locking nuts
• For the slider a longer screw M3x22 (or M3x25 with additional washer) is required

The eyepiece should be disinfected regularly.
It is also a good idea to use antibacterial medical filament for the eyepiece.

A similar toolset for eye drop bottles is available at
https://www.printables.com/model/1031668-eye-drop-assist-for-bottles

Changelog
2025-11-03   remark added  “infill= 100%”
2025-06-05 slider for “Ganfort” added
2025-06-06 image “EDAV_support” added