Slit lamp biomicroscope is an instrument designed to observe the eye from cornea to the anterior part of the vitreous and so is the portable slit lamp. They provide magnified view of the parts of the eye illuminated by intense beam of light. One can adjust the intensity and angle of the beam of light….
The ability of the eye to determine the crispness of the image against its background is known as contrast sensitivity. It is a measure of how well an individual can perceive differences in luminance or color of the adjacent areas of an image. It is an important aspect of visual functions because it is also…
Anisometropic amblyopia is a specific type of amblyopia (suppression of one eye). It occurs due to a significant difference in refractive error (nearsightedness, farsightedness, or astigmatism) between the two eyes. In this condition, one eye has a significantly different level of refractive error compared to the other eye, causing the brain to favor the eye…
What is vertical heterophoria? Vertical heterophoria (VH) is often a misdiagnosed condition. The person may suffer from uncontrolled headaches, dizziness, and get no relief on treatment. It is a condition of misalignment of eyes in a vertical plane. This misalignment can often be missed in routine eye exams due to its small size. It does…
While reading this blog, just remember and imagine the most beautiful sight that made you smile. This is enough to tell the importance of vision and ability to see the world. The human species can see the world in its 3-D form and can very well distinguish certain colors falling in certain wavelength. The human…
Use of chat gpt, AI in the field of optometry Since its launch, chat gpt has become a topic of discussion globally. Here we will discuss about use of chat gpt, AI in the field of optometry. What is chat gpt? Chatbot GPT is an artificial intelligence language model developed by OpenAI. GPT stands for…
What are dry eyes? Before addressing dry eyes effect on our daily life, lets go through the tear film layers. The tear film of eyes is composed of three layers: mucous layer, aqueous layer and the outermost is lipid layer. The lipid layer protects the aqueous layer of the tear to get evaporated from the…
The science of vision- How do our eyes work? Let’s make it as simple yet comprehensive as it can be for every little biologist or anybody who gets fascinated by the fact that these tiny yet paramount organs of vision are working and making us see the nature, our friends, the great architects, observe the…
Before digging to convergence insufficiency exercises, it is important to know that convergence is one of the type of vergence movements of eyes. Vergence is the opposite movement of the eye. Convergence is the disjugate movement of the eye to produce binocular single vision. We need convergence when we look at the near target. At…
Myopia vs hyperopia is a number of differences that differentiate both of the refractive errors in a prominent way. Their differences are given below: Definitions and power in myopia vs hyperopia The type of refractive error in which the image forms in front of retina is myopia. The overall power of the eye increases in…
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