International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Different Techniques for Cataract Detection Anjali K1, Bhavya K Bharathan2, Hanan Hussain3, Nirmala P S4, Swathy M5 1PG
Scholar, Dept. of Computer Science &Engineering, Vidya Academy of Science & Technology, Kerala, India PG Scholar, Dept. of Computer Science &Engineering, Vidya Academy of Science & Technology, Kerala, India 3 PG Scholar, Dept. of Computer Science &Engineering, Vidya Academy of Science & Technology, Kerala, India 4PG Scholar, Dept. of Computer Science &Engineering, Vidya Academy of Science & Technology, Kerala, India 5PG Scholar, Dept. of Computer Science &Engineering, Vidya Academy of Science & Technology, Kerala, India 2
---------------------------------------------------------------------***-------------------------------------------------------------------- Congenital cataract: Some times cataracts develop in Abstract - Cataract is an eye disease that caused by childhood, often in both eyes. It may be so small that opacity of lens. This will leads to complete loss of they do not affect vision. vision. Mostly cataracts are affected to aged peoples. Radiation cataract: It can develop after exposure to In this modern era, so many techniques are used for some types of radiation. detecting cataract. In this paper, various techniques for the diagnosis of cataract are focused. Cataracts classified based on age:Key Words: Cataract, Feature extraction, Thresholding, Classification
Congenital and acquired
Cataracts classified based on location:-
1.INTRODUCTION
Cataracts are very general in older people.The main causes of cataracts are diabetes, optic nerve damage, and macular degeneration and it can occur in either or both eyes.
Cataracts classified based on shape:-
It cannot spread from one eye to the other. It is mainly affected to lens of retina. The lens is a clear part of the eye that helps to focus light, or an image, on the retina. In a normal eye, light passes through the transparent lens to the retina. Range of affected people is depicted in figure 1.
Cortical, nuclear, sub-capsular Dot-like, coronary, lamellar
Cataracts classified based on degree:Immature, intumescent, mature, hypermature
1.2 Symptoms The most common symptoms of a cataract are:
Cloudy or blurry vision and poor night vision
Glare headlights, sunlight or lamps
Double vision or multiple images in one eye
Frequent prescription changes in your eyeglasses
1.3 Causes Most common causes for cataract are:
Fig -1: Range of cataract affected people
1.1 Types of Cataract Cataracts classified based on cause:
Secondary cataract: Cataracts also can develop in people who have other health problems, such as diabetes.
Traumatic cataract: It can develop after an eye injury, sometimes years later.
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Lifestyle, age, and diet
Previous eye injury [1]
Limit overexposure to sunlight
High altitude can also contribute to cataracts
Diabetes, obesity, or high blood pressure [2][3]
Smoking or drinking too much alcohol[4]
Difference between normal eye and cataract eye are shown in figure 2.
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