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Share your thoughts with other customers. Write a customer review. Most helpful customer reviews on Amazon. April 18, - Published on Amazon.

Verified Purchase. I really enjoyed this book and can't say enough about it.

Types of Color Blindness – Colblindor

A story of two women connected in life as close as any blood relatives could be. I was very impressed with this author.

Colored Noise, and How It Can Help You Focus

The story moves along through the good and bad pages of life. One in love with a dangerous man. How one woman sacrifices everything to care for the other. Overcoming overwhelming odds and coming together in an amazing ending too good to pass up. Courtroom drama at its best. This book shows the good, the bad, and the truly ugly and how it doesn't have to define your life to the bitter end.


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One so beautiful and one rather plain but beautiful in so many ways you can't really say which one is which. Lies and truth combined for survival will keep you reading this one to the amazing end.


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No disappointments in this book. November 11, - Published on Amazon. The life of Freddie Walker was one of ugliness, neglect, incest and abuse. When the opportunity to get away from that life presented itself and she was so cavalier about it, I was mad. She was set to leave her pimp, take her kids and start a real life, but she didn't see the very real danger that Jimmy Tate might have another plan in mind for her.

I wanted the story to have a better outcome, but it is written so well that I couldn't put it down. Written so that you see the middle part of the story first, the violence and the hope; then the beginning that starts to make sense of why things happened the way they did and then the ending which I didn't see that last twist coming. The story really felt real and the characters felt like people I cared about who were scarred by life's events. May 2, - Published on Amazon.

What is Color Blindness?

A brief synopsis: two young girls fending for themselves in a dangerous city, they are bound to fall under the "protection" of someone bad. Ruby and Freddie manage to thrive even though Freddie becomes a prostitute with four children. Then something bad happens and they both pay the price for something out of their control.

Premise: Good Character Development: Fabulous, on every level. Editing: Very good, a few mistakes but in the world of self publishing with no editor very minor.

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I normally have books endings figured out by the end of chapter one. This book managed to surprise me right to the end. I got this as a free download but it would be worth purchasing. July 11, - Published on Amazon.

Tip of the Week: Viewing Color-blind Previews of Your Pages

At the beginning of this book I thought the book was about Freddie Walker and her children, however, by the end, the story proved to be about a true love between two friends women , a love for the children involved and a true testament of what a real friend is all about. Ruby Johnson became an inspiration as I turned the pages and made me examine how I could be a better friend to at least 1 person in my life.

Ruby is a demonstration of "unconditional agape" love. Love prevails all even against some of the most evil circumstances, situations and many times people who are evil. There are three types of cones, each containing a specific pigment a photopigment called an opsin that is most sensitive to particular wavelengths of light.

The brain combines input from all three types of cones to produce normal color vision.

See a Problem?

These changes lead to an absence of L or M cones or to the production of abnormal opsin pigments in these cones that affect red-green color vision. These mutations lead to the premature destruction of S cones or the production of defective S cones. Impaired S cone function alters perception of the color blue, making it difficult or impossible to detect differences between shades of blue and green and causing problems with distinguishing dark blue from black.

In people with this condition, only S cones are functional, which leads to reduced visual acuity and poor color vision. The loss of L and M cone function also underlies the other vision problems in people with blue cone monochromacy. Some problems with color vision are not caused by gene mutations. These nonhereditary conditions are described as acquired color vision deficiencies. They can be caused by other eye disorders, such as diseases involving the retina, the nerve that carries visual information from the eye to the brain the optic nerve , or areas of the brain involved in processing visual information.

Acquired color vision deficiencies can also be side effects of certain drugs, such as chloroquine which is used to treat malaria , or result from exposure to particular chemicals, such as organic solvents. Red-green color vision defects and blue cone monochromacy are inherited in an X-linked recessive pattern. In males who have only one X chromosome , one genetic change in each cell is sufficient to cause the condition.

Males are affected by X-linked recessive disorders much more frequently than females because in females who have two X chromosomes , a genetic change would have to occur on both copies of the chromosome to cause the disorder. A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons. Blue-yellow color vision defects are inherited in an autosomal dominant pattern , which means one copy of the altered OPN1SW gene in each cell is sufficient to cause the condition.

Color blindness

In many cases, an affected person inherits the condition from an affected parent. Deeb SS. Molecular genetics of color-vision deficiencies. Vis Neurosci. The molecular basis of variation in human color vision. Clin Genet.


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Blue cone monochromacy: causative mutations and associated phenotypes. Mol Vis. Epub May 1.