ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Blindness Symptoms

Updated on February 25, 2016

Eyes form one of the most major organs in the human body. Any disturbance to them can cause partial or total blindness. It is imperative to take ample steps to protect them. Eye blindness can create problems by affecting his/her daily routine life.

Night blindness

Eyes of a human being may be suffering from “Night blindness” which is otherwise termed as Nyctalopia. If anyone feels difficult to see during nights or in dim lights, he is considered to be suffering from Nyctalopia. When rod cells which are imperative for vision are affected by a disorder, night blindness symptoms occur. An injury in the eyes, improper nutrient content or other deficiencies may cause this disorder. In certain cases, it can be genetic.

Causes of Night blindness

  • When the rod cells are unable to respond to the light, gradually progressive Nyctalopia results, otherwise called as ‘retinitis pigmentosa’ leading to ‘Optic Atrophy‘. Occasionally, day vision also gets impaired.
  • Night blindness is considered a case of genetic disorder, when the problem originates from birth. In such cases, the function of rod cells will be very much limited. This condition may continue for a long period and is called “X linked congenital stationary night blindness”.
  • People in less-developed countries are prone to suffer form night blindness due to Vitamin A deficiency.

Night blindness symptoms

  • Impairment of night vision or poor light vision or in darkness during daytime
  • Eyes being dry or having blurred vision
  • Reduction on contrast vision. Those who walk alongside cannot be identified in dim light
  • When seeing television programs or reading continuously, eyes get tired


Blindness Symptoms

Blindness Symptoms
Blindness Symptoms | Source

Color Blindness

When someone is not able to differentiate between certain colors, it is known as color blindness. It is a hereditary phenomenon. It is not so known and is a rare occurrence. Percentage of color blindness in women is less than that seen in men.

There are two major Types of Color blindness.

  • Total blindness
  • Partial blindness

The inability to distinguish between red and green colors is a prevalent disorder.


Causes of Color blindness

Color blindness is passed from one generation to the following generation. Due to the presence of cones in our eyes, colors are distinguished. If one out of three cones is absent or fails to function properly, color blindness occurs. As these deformities are present form the date of birth, they cannot be cured. Color blindness can happen due to injury or aging. Sometimes, due to side effects of certain drugs and medications, color blindness can occur.

Color blindness symptoms

If a person suffers from partial color blindness, he cannot differentiate between the red and green colors or the blue and yellow colors. Sometimes, the person cannot differentiate between the shades of any particular color. But, those who are suffering from total color blindness cannot see colors other than black, white and grey. One of the important color blindness symptoms is the inability to see the brightness of colors.

Read more of my healthy articles:

1. Blindness Symptoms

2. Teething Symptoms

3. How can you get Strep Throat

4. Remedy for Strep Throat

5. Blindness Symptoms

6. How can you get Strep Throat

7. Remedy for Strep Throat

© 2015 TonyYu

Comments

    0 of 8192 characters used
    Post Comment

    No comments yet.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: "https://hubpages.com/privacy-policy#gdpr"

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)