
Decoding Deuteranopia: Understanding, Diagnosing, and Utilizing Genetic Testing
Roughly 1% of males have deuteranopia, an X-linked recessive red-green color blindness; Ishihara and Farnsworth-Munsell tests diagnose it, OPN1MW analysis confirms it.

MD · MBA
Physician specializing in genetic analysis and personalized preventive medicine, and author of Outsmart Your Genes.
Brandon Colby is a physician-expert in the fields of genetic analysis and Personalized Preventive Medicine. He holds an MD from the Mount Sinai School of Medicine, an MBA from Stanford University's Graduate School of Business, and a degree in Genetics from the University of Michigan.
Dr. Colby is the author of the book Outsmart Your Genes and has developed numerous technologies that improve the analysis, interpretation, and actionability of genome sequencing data. He is an Affiliate Specialist of the American College of Medical Genetics and Genomics (ACMG), an Associate of the American College of Preventive Medicine (ACPM), and a member of the National Society of Genetic Counselors (NSGC).
Articles by Brandon Colby, MD are reviewed for accuracy by Sequencing's medical and scientific team. This page is for informational purposes and does not constitute medical advice.

Roughly 1% of males have deuteranopia, an X-linked recessive red-green color blindness; Ishihara and Farnsworth-Munsell tests diagnose it, OPN1MW analysis confirms it.

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The CES1 gene encodes carboxylesterase 1, an enzyme that processes many drugs; variants, fatty liver disease and inflammation can all shift a patient's response.

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Disrupted development of the midline cerebellum affects coordination, posture and eye movement; prenatal MRI and postnatal imaging support the diagnosis.

Plasminogen normally dissolves blood clots, and an autosomal dominant mutation impairs it; plasminogen assays, DNA sequencing and carrier testing are explained.

Heart disease striking young adults reflects many genes and environment; susceptibility loci in Mexican families, Korean exome findings and South Asian risk are reviewed.

Discover the role of genetic testing in diagnosing early spermatogenesis maturation arrest, a cause of male infertility, and its benefits for treatment and family planning.