My first blog post

                        Welcome to my blog 


Comments

Post a Comment

Popular posts from this blog

cornea

Image
  cornea The cornea is the clear, transparent, dome-shaped front surface of the eye. It covers the iris, pupil, and anterior chamber, and it is the main refractive surface of the eye. Key Features of the Cornea Transparency → allows light to enter the eye. Shape → convex, more curved than the sclera. Thickness → Central cornea: ~0.5 mm Peripheral cornea: ~1 mm Diameter → ~11–12 mm (horizontal), ~10–11 mm (vertical). Refractive Power → ~43 diopters (≈ 2/3 of the total eye’s focusing power). Avascular → no blood vessels; nourished by tears, aqueous humor, and limbal vessels. Nerve Supply → trigeminal nerve (ophthalmic division); very sensitive to touch and pain. 🔹 Layers of the Cornea (outside → inside, 5 layers) Epithelium – stratified squamous; regenerates quickly. Corneal Epithelium It is the outer protective layer of the cornea. Makes up about 10% of corneal thickness (~50 µm). Type: Non-keratinized stratified squamous e...
Read more

BINOCULAR VISION

Image
  BINOCULAR VISION BINOCULAR VISION AND SPACE PERCEPTION Slide 1 Location: Position of an object in physical (objective) space Localization: Position of the object in visual (subjective) space Retinal elements/points/ Areas: The retinocerebral apparatus engaged in elaborating a sensation in response to the excitation of a unit area of the retinal surface Slide 2 Relative subjective visual direction  ( BINOCULAR VISION ) Each retinal element localizes the stimulus as a visual percept in a specific visual direction relative to the  visual direction  of the fovea Slide 3-5 Retinomotor values It is the degree of movement of the eye to get fixation at the fovea Slide 6-7 Common relative subjective visual direction All object points that simultaneously stimulate the two fovea appear in one and the same subjective visual direction i.e not in the direction of the principal line of direction of either eye but in a direction coinciding with the medial plane of the head Slide 8...
Read more

Important of colour check

  Why is it important to check colour vision? Checking colour vision is important for several reasons: 1. Early Detection of Vision Disorders It helps detect congenital colour blindness, especially in children. Can also reveal acquired conditions due to eye diseases (e.g., glaucoma, optic neuritis). 2. Career Requirement Certain professions require normal colour vision, such as: Pilots Electricians Military personnel Police officers Graphic designers Drivers Railway and maritime workers 3. Safety and Daily Functioning Correct colour recognition is vital for identifying traffic lights, warning signs, and colour-coded materials. Difficulty distinguishing colours can impact school performance, cooking, clothing choices, and reading charts or graphs. 4. Monitoring Disease Progression Colour vision testing helps track changes in patients with: Diabetic retinopathy Multiple sclerosis Macular degeneration Medication side effects (e.g., ethambutol) 5. Educational Guidance In children, dete...
Read more