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Degenerative ocular conditions (colour Blindness) image - Coggle Diagram
Degenerative ocular conditions (colour Blindness) 
Pathophysiology
It occurs when there is a problem with the pigments in certain nerve cells of the eye that sense colour.
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If one pigment is missing,a person may have trouble telling a difference between green and red.
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Causes
Eye disease, like glaucoma or macular degeneration
Brain and nervous system diseases, like Alzheimer's or multiple slerosis
Some medicines like, Plaquenil
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References
Silvestri, L. A. (2020). Saunders comprehensive review for the NCLEX-RN examination. St. Louis, MO: Elsevier.
Gulanick, M., & Myers, J. L. (2017). Nursing care plans: Diagnoses, interventions, & outcomes. St. Louis, MO: Elsevier