Patient Information
How many patients participated in this study?
5
In which participants did the implant remain stable and in a central position?
Participants 2, 3, and 5
What did the researchers use as a control for the testing?
The implant/camera system was turned off completely
Did patient one display any improvement on the forced-choice bar orientation test?
Unfortunately not
What does figure 1 display?
This figure shoes how the implant, along with the glasses, captures the visual field and converts it to an electric current to stimulate photoreceptors
What condition did all of the participants have?
Age-related macular degeneration (AMD)
What was unique about participant 1 that likely caused the implant to move?
They were under local anesthesia
What test did the researchers use to assess visual acuity?
A letter recognition test
How close was the prosthetic visual acuity to the excepted level based on the pixel pitch of the camera?
10-30%
What does figure 2 display?
This figure shows an image of the opaque video glasses with the camera attached, and it shows the letter test set up
What were the age constraints on the participants?
60 years old and up
What is a retinotomy?
A surgical incision of the retina
How were the sets of letters organized?
3 sets (A-C) of letters increasing in difficulty
What trend in patient 2 did the researchers observe in accuracy and response time across the three sets (A-C) of letters?
What does figure 3 display?
What was the best-corrected visual acuity restraint for participation?
20/400 or worse
What did the researchers describe as the most challenging part of the surgery?
Separating the retina from the retinal pigment epithelium
How did the researchers ensure that the patients had an absence of photoreceptors in the retina?
An optical coherence tomography (OCT)
How well did patients 2, 3, 4, and 5 perform on the forced-choice bar orientation test?
93.5 +/- 3.8%
What does figure 4 display?
This figure shows the implants at their intended locations in participants 2,3 and 5
Did the participants have any field of vision remaining?
Yes, they retained visual perception in the peripheral field
What was the visual acuity expected from the pixel pitch?
20/420
What part of the visual field captured by the camera was projected onto the retina?
Only the central third of the image
What range of visual acuity did the three participants with optimal placement of the implant display?
20/460-20/550
What does table 1 display?
This table shows the overall results, tracking each of the five patients from before surgery and after.