Methods for selectively controlling movement of a contact lens during a packaging process
A method of selectively controlling movement of a contact lens in blister packaging comprising a cavity, the method comprising depositing an electric charge at a location in the cavity, securing the contact lens to the blister packaging at the location with the electric charge, and after the step of securing the contact lens, injecting a lens hydrating liquid into the cavity whereby the lens is hydrated and the securing terminated. A method of selectively controlling movement of a contact lens in blister packaging comprising a cavity, the method comprising depositing a droplet of a first lens hydrating liquid in the cavity, securing the contact lens to the blister packaging with the droplet, and after the step of securing the contact lens, injecting a second lens hydrating liquid into the cavity whereby the lens is hydrated.
1. A method of selectively controlling movement of a contact lens in blister packaging comprising a cavity, the method comprising:
depositing a static electric charge at a location in the cavity;
securing the contact lens to the blister packaging at the location with the static electric charge; and
after the step of securing the contact lens, injecting a lens hydrating liquid into the cavity whereby the lens is hydrated and the securing terminated.
2. The method of claim 1 , wherein the step of depositing the static electric charge is achieved using a first electrode and a second electrode on opposing sides of the cavity.
3. The method of claim 2 , wherein one of the electrodes is a ground electrode.
4. The method of claim 2 , wherein one of the electrodes is a negative electrode, and the negative electrode is located above a concave surface defining the cavity.
5. The method of claim 2 , where in the step of depositing the static electric charge comprises forming a linearly varying voltage signal between the electrodes.
6. The method of the claim 2 , wherein the step of depositing the static electric charge comprises forming a voltage of fixed magnitude between the electrodes.
7. The method of claim 1 , wherein the static electric charge is a negative charge.
8. The method of claim 1 , wherein the cavity is dome-shaped.
9. The method of claim 1 , wherein the location is a central location.
10. The method of claim 1 , wherein the depositing the static electric charge is achieved using a static electric charging device.
11. The method of claim 1 , further comprising steps of:
sealing the cavity containing the contact lens and hydrating liquid with lid stock; and
after the sealing step, autoclaving the packaged lens and hydrating liquid.
12. The method of claim 1 , wherein in the step of depositing the static electric charge, the static electric charge is disposed on the packaging in an area of less than about 5 mm 2 .
13. The method of claim 1 , wherein the location is a central location of the cavity.