#colorblindness

Table of Contents I. The Sociology of a Late-Night Debate II. The Catalyst: Why Mention She Was Black? III. The Data of Inequality: Beyond the Sentiment IV. The Fortress of Blackness V. The Intergenerational Bridge: Internal vs. External VI. Full Circle The Sociology of a Late-Night Debate My youngest son recently graduated Cum Laude with a degree in sociology. I like to think that I had…

বর্ণান্ধতা কি?

বর্ণান্ধতা (Color Blindness) হলো এমন একটি দৃষ্টিজনিত সমস্যা, যেখানে একজন ব্যক্তি স্বাভাবিকভাবে সব রঙ আলাদা করে দেখতে পারেন না। সাধারণত লাল, সবুজ বা নীল রঙ পার্থক্য করতে সমস্যা হয়।এটি সম্পূর্ণ অন্ধত্ব নয়, বরং রঙ দেখার ক্ষমতার সীমাবদ্ধতা।

বর্ণান্ধতার কারণ

বর্ণান্ধতা সাধারণত চোখের রেটিনার Cone Cells-এর সমস্যার কারণে হয়।

প্রধান কারণগুলো হলোঃ

জেনেটিক (বংশগত) – জন্মগতভাবে হয়বয়সজনিত সমস্যাকিছু

ওষুধের পার্শ্বপ্রতিক্রিয়া

চোখের রোগ (যেমন glaucoma, macular degeneration)

স্নায়বিক সমস্যা

বর্ণান্ধতার ধরন

বর্ণান্ধতা কয়েক ধরনের হতে পারে—

Red-Green Color Blindness

সবচেয়ে সাধারণ

লাল ও সবুজ আলাদা করতে সমস্যা

Blue-Yellow Color Blindness

নীল ও হলুদ রঙে বিভ্রান্তি

Complete Color Blindness

খুব বিরল

সবকিছু সাদা-কালো দেখা

লক্ষণ

রঙ সঠিকভাবে চিহ্নিত করতে না পারা

একই রঙের মধ্যে পার্থক্য করতে সমস্যা

ট্রাফিক সিগনাল বুঝতে অসুবিধা

কাপড়ের রঙ মেলাতে সমস্যা

প্রতিরোধ

যেহেতু এটি বেশিরভাগ ক্ষেত্রে বংশগত, তাই পুরোপুরি প্রতিরোধ সম্ভব নয়। তবে—চোখের নিয়মিত পরীক্ষা করা

ডাক্তারের পরামর্শ মেনে চলা

i have this type of colorblindness. Honestly I just tell people its grey to me because its so much easier than explaining. If I ever say a colour is weird you know why i guess lmao

Seeing blood in urine is often the first clue that something is wrong. For many people, noticing this symptom prompts a medical visit that can lead to an early diagnosis of bladder cancer. However, for people with colorblindness, detecting that warning sign may be far more difficult. Because many forms of color vision deficiency make it hard to perceive red tones, blood in urine can go…

Em meio ao crescimento de narrativas que questionam a legitimidade das cotas raciais no Brasil sob o manto da “isonomia” e da “neutralidade”, um estudo publicado por Wagner Graff Vieira e Maurício Zanotelli lança um alerta contundente: o uso acrítico do direito comparado com os Estados Unidos pode minar, por dentro, a política de ações afirmativas brasileira. No artigo “Cotas raciais em…

[ Disclaimer: I am not colorblind myself and do not personally know anyone with the condition. Everything I write here is based on research I have done and some things may not be entirely accurate. If something doesn’t seem quite right, you’re free to correct me ]

What is Colorblindness?

Colorblindness is defined as a reduced ability to perceive color. Colorblind people will struggle to tell the difference between certain colors, the specifics of which will depend on what version of the condition they have.

What are the Different Types of Colorblindness?

Colorblindness most commonly manifests in three different forms: Red-Green Colorblindness; Yellow-Blue Colorblindness; and Monochromacy. Each of these can affect a person in various ways based on their severity.

Red-Green Colorblindness, the likeliest version of the condition, will most commonly be Deuteranomaly, which makes certain shades of green look more red. It can also be Protanomaly, which is the inverse of the former, and makes certain shades of red look more green, and less bright.

Deuteranopia and Protanopia are the more severe versions of these, with both causing the individual to be unable to tell the difference between red and green at all. While the former two are mild and don’t typically impede most activities, these cause issues.

Here is a visual representation of each:

Blue-Yellow Colorblindness, which is much less common than Red-Green Colorblindness, manifests in a similar form to it. Tritanomaly makes blue & green and yellow & red look similar, while Tritanopia, the more severe version, makes most of these colors indistinguishable to the affected individual.

Here is a visual representation of each:

Finally, Monochromacy, or Achromatopsia, is characterized by the complete inability to perceive color, and is what most people think of when they hear “Colorblindness”. It is incredibly rare, and people who have it may have issues seeing in general or be more sensitive to light.

Here is a visual representation:

The type of colorblindness you choose for your character will depend on how you want their colorblindness to affect the story. If you intend for it to be a fun fact about them that never serves as a plot point, then it might be best to pick a less severe version. If you want their condition to directly affect the narrative, then you should consider which version would affect them in the way you want it to.

How does Colorblindness affect people in Daily Life?

How your character’s colorblindness affects them will depend heavily on the type of place your story is set in.

A realistic fiction narrative set in the real world may see a character with Deuteranopia or Protanopia struggling with traffic signals, as they can’t tell the difference between red and green. Technology and text on colored backgrounds are also hurdles for Colorblind people.

One struggle that will most likely affect a Colorblind character, no matter what sort of world you’ve placed them in, is working out directions or instructions that use color-coding. Something that a lot of Colorblind individuals also experience is not being able to tell when a fruit is ripe or not.

Like Colorblind people in real life, your character will probably have learned to rely on other senses, such as smell, hearing, and touch, to differentiate between things where their sight has failed them. Don’t just write about the struggles your character experiences; Consider how they would have learned to adapt to those struggles and find ways to function in the world.

Colorblindness and Genetics

Most of you probably already know that the vast majority of Colorblind people are male; While one in twelve men will be Colorblind, only one in two hundred women will be. That’s a massive difference, and there’s a reason for that.

The most common form of colorblindness (Red-Green) is dependent on the X chromosome, and is a recessive gene. Therein lies the problem: Since women have two X chromosomes, they need to inherit the gene on both of those X chromosomes in order to be colorblind. Meanwhile, men, with only one X chromosome, only need to inherit it on one. This means that women are just as likely to be carriers of the gene, but are much less likely to present with it.

This doesn’t mean that it’s unrealistic for your female character to be colorblind; It still happens in real life, and anyway, there are way more people with red hair and heterochromia and vitiligo in fiction than in real life, so who cares?

It does mean, though, that you now have some extra information in case you wanted to make a family tree. So, if your female character is colorblind, it means that both of her parents were either colorblind or at least carried the gene - meaning that someone above them had it, too.

That was a bit of a long post. I admit that my research was rather limited, and that the genetics section was a massive oversimplification, but if I were to ramble about Punnett squares and chromosomes with free rein we’d be here all day, and it would quickly stop being a writing post.