I think it's important to recognize that this is far from the only study pointing to this, and that similar problems are associated with CFL's.
For example, here is a 2014 study, "White Light–Emitting Diodes (LEDs) at Domestic Lighting Levels and Retinal Injury in a Rat Model" http://ehp.niehs.nih.gov/1307294/
Links to eye toxicity, macular degeneration, and blindness are not the only problems associated with new lighting either, which tends to be very heavy in the blue components. Lots of research links usage of blue-heavy white lighting to damaging circadian rhythms, which can lead to significant health effects. https://www.sciencedaily.com/releases/2011/09/110912092554.h...
For example, here is a 2014 study, "White Light–Emitting Diodes (LEDs) at Domestic Lighting Levels and Retinal Injury in a Rat Model" http://ehp.niehs.nih.gov/1307294/
This article cites numerous studies in the quotes section ( scroll down) http://lowvision.preventblindness.org/daily-living-2/artific...
Links to eye toxicity, macular degeneration, and blindness are not the only problems associated with new lighting either, which tends to be very heavy in the blue components. Lots of research links usage of blue-heavy white lighting to damaging circadian rhythms, which can lead to significant health effects. https://www.sciencedaily.com/releases/2011/09/110912092554.h...
This year the AMA issued a public safety warning regarding LED street lights because of the association with circardian rhythm disruption and related health effects. http://www.cnn.com/2016/06/21/health/led-streetlights-ama/in...
Paul Jaminet has stated that circadian rhythm disruption has been more strongly linked to cancer than any food study, ever.
I use the GE Align PM LED bulbs, available on Amazon, which cut out most of the blue frequencies and largely address both sets of problems. Highly recommended. https://www.amazon.com/GE-Lighting-93842-350-Lumen-Dimmable/...
EDITED to correct summary of AMA announcement.