Eye implant device and method

A mechanism and method for filling the vacated eyesocket of a deceased person after an eyeball has been donated. A plurality of different sized implant members are positioned within each other, and the larger implant members can be opened to access the smaller implant members. Protrusions are formed on each implant member for engaging the inner surface of the deceased person's eyelids when the implant is positioned within the eyesocket. The different sized implants are also adapted for implantation within the deceased's eyeball when only the cornea and fluid sac have been removed during an in situ excision.

BACKGROUND OF THE INVENTION 
The invention relates to devices and methods for filling the space which 
has been vacated by the removal of an eyeball or portions thereof from a 
deceased person for purposes of scientific research or transplant to a 
living person. 
Many persons elect to donate particular organs for scientific research or 
transplant upon death. Various parts of the human eye can be removed from 
a deceased persons body to benefit scientific research or to replace 
damaged or defective components of a living persons eye. In some states, 
the deceased person's entire eyeball is removed from the eyesocket by a 
technician authorized to perform such procedures. This procedure is known 
as an enucleation. In other states, the technician will perform what is 
referred to as an in situ excision, which is the removal of the cornea 
from the eyeball. The cornea is the clear covering over the colored 
portion at the front of the eyeball. In such a procedure the technician 
makes a circular incision a few millimeters outside of the perimeter of 
the cornea and peals off the cornea and leaves the rest of the eyeball in 
place within the eye socket. The cornea is then preserved in a solution 
for later transplant or scientific research. 
After an in situ excision, an embalmer will typically remove the sac of 
fluid from the center of the eyeball which has been exposed by removal of 
the cornea. Removal of the fluid sac prevents the fluid from seeping out 
of the eye at a later time. The white portion of the eyeball which remains 
in the eyesocket is not rigid, and since it is no longer supported by the 
sac of fluid, the white portion of the eyeball will not retain its 
previous rounded shape but will generally collapse. A collapsed eyeball 
will make the deceased person's eyes look generally sunken and unnatural 
after the eyelids are closed. It is general practice for the embalmer to 
replace this fluid sac with embalming materials in order to support the 
collapsed eyeball and to thereby create a natural look when the eyelids of 
the deceased are closed. It is typical practice within the industry for 
the embalmer to fill the space within the eyeball with embalming clay, 
cotton or gauze. This process can be a relatively delicate task, and can 
therefore be relatively time consuming. 
Out of respect for the deceased, it is the general practice within states 
that remove the entire eyeball from the deceased's eyesocket to fill the 
vacant space within the eyesocket. If the eyesocket is not filled after 
removal of the eyeball, the eyelid will appear sunken and unnatural. 
Therefore, filling the eyesocket also gives the deceased person's body a 
natural appearance. It is general practice within the industry to fill the 
vacated eyesocket with embalming clay, gauze or cotton. Typically the 
embalmer will wad up an amount of cotton or gauze and place it in the 
eyesocket, and then place clay within the eyesocket and form it to the 
general size and shape of the removed eyeball. Therefore the embalmer must 
mold the gauze or clay into the shape of an eyeball each time an eyeball 
is harvested. It is often difficult for the embalmer to replicate the 
shape of the removed eyeball, and the embalmer often spends an undesirably 
large amount of time working the clay or gauze into the shape and size of 
the removed eyeball. Once the gauze or clay has been properly shaped, the 
embalmer places a small cap over the clay and gauze. The cap has small 
upstanding spikes punched in it which serve to engage the inner surface of 
the eyelid for securely holding the eyelid in a closed position. 
In the past, technicians have also replaced the removed eyeball with other 
structures such as a marble or a ball bearing. However, if the marble or 
ball bearing does not have the general size and shape of the removed 
eyeball, the deceased person will not have a natural look after 
implantation. Although the eyeballs of mature adult humans tend to be 
relatively similar in size and shape, some people have eyeballs which are 
slightly smaller or larger than the average. The human eyeball grows to 
its mature full size generally by the time the person reaches 
pre-pubescence at about the age of 11, and therefore it is common for 
young persons below the age of 11 to have eyeballs smaller than the 
average adult. If the marble or ball bearing which is used to fill the 
vacant eyesocket is too small, the technician must take the additional 
steps of inserting clay and gauze or cotton to further fill the eye 
socket. If the marble or ball bearing is too large it may not fit into the 
eyesocket or may yield an unnatural appearance. Therefore, a technician 
would be required to locate a ball bearing or marble which matches the 
particular size of the removed eyeball. Once the technician has properly 
filled the eyesocket with a ball bearing or marble, he then inserts the 
spiked cap in an attempt to hold the eyelids closed. But if the cap is 
placed directly against the marble or ball bearing the cap may slide 
around and not retain the eyelid in a closed position. 
It would therefore be desirable to provide a method and mechanism which 
allows a technician to quickly and easily fill the space vacated by 
removal of the cornea, fluid sac or entire eyeball of a deceased. It would 
be desirable for such a mechanism to give the deceased a natural 
appearance. When an entire eyeball is removed from the deceased, it would 
be desirable to eliminate the need for an embalmer or technician to form a 
prosthetic eyeball out of gauze, clay or cotton each time an eyeball is 
harvested. It would be desirable for such a method and structure to result 
in the eyelid of the deceased being securely held in a closed position. It 
would also be desirable to provide a method and mechanism which is adapted 
to easily replace a variety of different sizes of eyeballs. It would also 
be desirable to provide a mechanism which allows an embalmer to more 
easily fill the space vacated at the center of an eyeball when the fluid 
sac has been removed after an in situ excision. 
SUMMARY OF THE INVENTION 
The preferred embodiment of the present invention provides an implant 
member having the general size and shape of a mature adult eyeball. A 
technician who has removed an entire eyeball from a deceased can quickly 
and easily place the implant in the eyesocket vacated by the donated 
eyeball, thereby eliminating the need to specially form clay and gauze by 
hand into the size and shape of the donated eyeball. Protrusion members 
are formed on the front portion of the implant member for engaging the 
inner surface of the deceased person's eyelid for securely holding the 
deceased person's eyelids in a closed position. The preferred embodiment 
provides an implant the size of an average adult eyeball, and two 
progressively smaller sized implant members which fit within the average 
sized implant. The average or largest implant and the medium sized implant 
are formed of plastic halves or shells which can be snapped apart to 
access the implant members positioned inside. The preferred embodiment 
therefore provides a mechanism which allows an embalmer to fill the space 
vacated by a variety of sizes of eyeballs quickly and easily. 
The present invention is also adapted to fill the space vacated by the 
fluid sac removed from a deceased's eyeball after a technician has removed 
the cornea via an in situ excision. The proper sized implant can be 
positioned within the eyeball for supporting the remaining white portion 
of the eyeball to yield a natural look when the eyelids are closed. The 
spiked protrusions will engage the inner surfaces of the eyelids to 
maintain the eyelids in a closed position. 
The implant members according to the present invention can be provided to 
technicians in the kits having the supplies needed to carry out the 
removal procedure. Therefore the implants according to the present 
invention are available for use by the embalmer directly after the removal 
procedure.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring now to FIG. 1, there is shown a cross sectional view of an adult 
human eyeball 10 within an eyesocket 12. The cornea 14 is the colored 
portion of the persons eye located at the front of the eyeball 10. A fluid 
sac 16 is positioned within the eyeball 10 and helps give the eyeball 10 
its shape. The eyesocket 12 is formed of bone material. A layer of fatty 
tissue 18 is positioned between the eyeball 10 and the eyesocket 12. 
Muscles (not shown) as well as the optic nerve 20 are attached to the 
eyeball 10 and must be cut in order to remove the eyeball 10 from the 
socket 12. Eyelids 22 are also shown in FIG. 1. 
Referring now to FIG. 2, there is shown the preferred embodiment positioned 
within a human eyesocket 12 according to the present invention. First, 
second and third implant members 24, 26 and 28 are provided by the present 
invention, as seen in FIGS. 2 and 5. The first implant member 24 according 
to the preferred embodiment has an outer surface 30 of a size and shape 
generally smaller that an average mature adult's eyeball. The first 
implant member 24 according to the preferred embodiment is approximately 
18 millimeters from front to back and approximately 17 millimeters from 
top to bottom. The front portion 32 of the outer surface 30 includes 
spikes or protrusions 34 which extend outwardly from the outer surface 30. 
The first implant member 24 is formed of plastic and is solid in order to 
reduce manufacturing costs. 
The present invention includes a second or intermediate sized implant 
member 26 having an outer surface 36 which is also generally smaller in 
size and shape than an average mature adult eyeball. The second implant 
member 26 is approximately 21 millimeters from front to back, and is 
approximately 20 millimeters from top to bottom. The second implant member 
26 has first and second portions or halves 38 and 40 which releasably fit 
together. Mating portions 42, as best seen in FIG. 3, are formed in the 
first and second portions 38 and 40 which allow them to be easily snapped 
together or detached from one another. The embodiment shown in the 
drawings is a snap fit, but other mating features such as a friction fit 
or a threaded feature could also be utilized. The first and second shell 
portions 38 and 40 define a hollow inner portion 44 which has an inner 
diameter large enough to receive the first implant member 24. Protrusions 
34 are formed in the front portion 46 of the second implant member 26 for 
engaging the inner surface of the deceased person's eyelids 22 for 
maintaining the eyelids 22 in a closed position. 
The present invention also provides a third or average sized implant member 
28 which has an outer surface 48 generally similar in size to that of an 
average mature adult eyeball. The third implant member 28 according to the 
preferred embodiment is approximately 24 millimeters from front to back, 
and is approximately 23 millimeters from top to bottom. First and second 
shell portions or halves 50 and 52 releasably snap together to define the 
third implant member 28. Mating features 54, as best seen in FIG. 3, 
formed in the first and second portions 50 and 52 allow the two shells 50 
and 52 to easily snap together or apart. An interference or snap fit is 
shown, but other mating features such as a friction fit or threaded 
features could be utilized. The shells 50 and 52 form an inner hollow 
portion 56 having an inner diameter large enough to receive the second 
implant member 26. Protrusion members or spikes 34 are formed in the front 
portion 58 of the third implant member 28 which secure the deceased 
person's eyelids 22 in a closed position. The third implant member 28 also 
includes a flatted portion 60 which allows an embalmer to place it on a 
flat surface without it rolling out of place. 
Next, the operation and use of the preferred embodiment according to the 
present invention will be discussed. According to the preferred 
embodiment, the first implant member 24 is positioned within the second 
implant member 26, and the second implant member 26 is positioned within 
the third implant member 28. Therefore the present invention provides a 
plurality of different sized eye implants in a compact configuration. The 
first, second and third implant members can be made from rubber material. 
The assembled eye implants 24 26 and 28 can be included as part of the kit 
of materials and supplies the technician would receive from an eye bank or 
other organization before an enucleation or in situ excision is to be 
performed. The embalmer or technician can then use the present invention 
once the technician has completed the removal procedure. 
If the entire eyeball 10 has been removed by the technician during an 
enucleation, and the eyeball 10 was the size of an average adult eyeball, 
then the technician or embalmer would simply place the third implant 
member 28 into the empty eyesocket 12 and close the deceased person's 
eyelids 22. The first and second implant members 24 and 26 would remain 
within the third implant member 28, thereby minimizing the effort on the 
part of the embalmer. The protrusions 34 located on the front portion 58 
of the third implant member 28 engage the inner surface of the eyelids 22 
for keeping the eyelids 22 closed. 
If the donated eyeball 10 is smaller than an average adult's eyeball then 
the embalmer would open the third implant member 28 and remove the second 
implant member 26. If the removed eyeball 10 was the approximate size of 
the second implant member 26, then the embalmer can place the second 
implant member 26 in the empty eye socket 12 and close the eyelids 22. The 
first implant 24 remains within the second implant 26, and the third 
implant member 28 can be discarded. If the removed eyeball 10 is smaller 
than the second implant 26, then the embalmer can snap open the second 
implant member 26 and place the first implant member 24 in the eyesocket 
12. The second and third implant members 26 and 28 can then be discarded. 
The protrusions 34 on the front portion of the implant members will engage 
the inner portion of the eyelids 22 for keeping the eyelids closed. 
If the removed eye is larger than the average adult eyeball, then the third 
implant member 28 can be placed in the eyesocket 12 and a standard eye cap 
having spikes as discussed above in the Background of the Invention can be 
placed over the protrusions 34 at the front 58 of the third implant member 
28. This will increase the effective size of the structure placed within 
the eyesocket 12 to better replicate the larger size of the removed 
eyeball. The cap will be securely held in place and prevented from 
slipping by the spikes 34 formed on the front portion 58 of the third 
implant member 28. 
The present invention has been described above as having three different 
sizes of implants 24, 26 and 28 which are situated within one another. 
However, less than or more than three implants could be provided within 
the spirit of the present invention. Furthermore, the present invention is 
described above as having the largest implant member 28 of a size 
generally similar to an average adult's eyeball, but the largest implant 
member could also be sized larger than an average adult's eyeball. An 
implant member having the size of an average adult's eyeball could then be 
provided as one of the smaller sized implant members. 
The preferred embodiment of the present invention allows the embalmer or 
technician to quickly and easily fill the empty eyesocket with a structure 
that generally replicates the shape and size of the donated eyeball. The 
present invention eliminates the time consuming process of forming gauze 
or clay by hand into the shape and size of the donated eyeball 10. Since 
the protrusions 34 are formed directly on the outer surface of the implant 
members 24, 26 and 28, the additional step of inserting a separate spiked 
cap is eliminated. Furthermore, the preferred embodiment provides a 
plurality of different sizes which can be inserted into the empty 
eyesocket 12, and therefore the embalmer is not required to search for a 
marble or ball bearing that would match the size of the donated eye 10. 
The present invention is also adapted for use after an in situ excision has 
been performed. Once the cornea 14 has been cut and peeled away, and the 
fluid sac 16 has been removed, the embalmer can insert the proper sized 
implant member 24, 26 or 28 into the eyeball 10. The implant member 24, 26 
or 28 would thereby support the white portion of the eyeball 10 in the 
absence of the fluid sac 16. If a cornea 14 and fluid sac 16 is removed 
from an average sized adult eyeball, then the embalmer can snap open the 
third implant member 28 and remove the second implant member 26. The 
second implant member 26 is generally the size of the cavity within the 
empty eyeball 10. The embalmer can squeeze the second implant member 26 
slightly while holding open the empty eyeball 10 and insert the second 
implant member 26 through the opening created by the excised cornea 14. 
The embalmer could also make a small incision into the eyeball 10 at the 
edge of the opening left by the removed cornea 14 and thereby facilitate 
inserting the second implant member 26 into the eyeball 10. The embalmer 
can utilize whichever implant member 24, 26 or 28 has a size closest to 
the size of the cavity within the eyeball 10. 
The present invention therefore serves the dual purpose of helping an 
embalmer fill the space vacated by a technician when either the cornea 14 
is removed during an in situ excision or when the entire eyeball 10 is 
removed during an enucleation procedure. The present invention could 
therefore be included in the kit of supplies typically sent to all 
technicians regardless of which procedure is to be performed.