https://nicetoview.blogfa.com عینک، لنز، راه های پیشگیری، کنترل و درمان بیماریهای چشمی fa blogfa.com Sun, 22 Feb 2026 20:47:35 +0330 https://nicetoview.blogfa.com/post/383 What does residual astigmatism mean? Residual astigmatism can be caused by incorrect placement of the IOL , incorrect marking of the cornea, inaccurate preoperative measurements, unanticipated surgically induced astigmatism, posterior corneal curvature, or rotation of the IOL itself. incorrect placement of the IOL: Most times, a primary malposition occurs because of surgeon error. In these instances, part of the lens may be sitting in the capsular bag and Sun, 22 Feb 2026 20:47:35 +0330 nicetoview nicetoview.blogfa.com/post/383 https://nicetoview.blogfa.com/post/382 Blind spot test To see or not to see. The eye’s retina receives and reacts to incoming light and sends signals to the brain, allowing you to see. One part of the retina, however, doesn't give you visual information—this is your eye’s “ blind spot .” At the back of your eye is the retina. Your retina is made up of light-sensitive cells which send messages to your brain about what you see. Everyone has a spot in their retina where the optic nerve connects. Sat, 13 Dec 2025 22:39:00 +0330 nicetoview nicetoview.blogfa.com/post/382 https://nicetoview.blogfa.com/post/381 Pars plana refers to a region of the eye that is characterized by clear, smooth, cystoid cavities known as pars plana cysts , which exist between the pigmented and nonpigmented epithelial layers. The pars plana (also known as orbicularis ciliaris) (Latin: flat portion) is part of the ciliary body in the uvea (or vascular tunic, the middle layer of the three layers that comprise the eye). It is about 4 mm long, located near the junction of the iris and Fri, 21 Nov 2025 15:30:00 +0330 nicetoview nicetoview.blogfa.com/post/381 https://nicetoview.blogfa.com/post/380 What are the properties of the color green ? Researchers have shown that the green color has the ability to soothe our nervous system. Indeed, since it is the easiest color to perceive for our eyes, our whole body can then relax when this color surrounds us. That's why green is so prevalent in hospitals, schools or offices. THE COLOUR GREEN Soothing, and restful on the eye. Relaxing mentally as well as physically. Thu, 20 Nov 2025 18:55:00 +0330 nicetoview nicetoview.blogfa.com/post/380 https://nicetoview.blogfa.com/post/379 C orneal d ensitometry ( CD ) uses the biological properties of the cornea to visualize the morphology of the cornea and determine the degree of corneal transparency . At present, it is an emerging metric that has shown promise in various clinical diagnosis and evaluation of eye diseases and surgeries. We introduce the different methodologies used to measure CD. Furthermore, we systematically categorize the diagnostic value of CD into high, medium, and low Sun, 16 Nov 2025 19:42:00 +0330 nicetoview nicetoview.blogfa.com/post/379 https://nicetoview.blogfa.com/post/378 We suggest a theory to frozen light, which was first registered in 2000 by Lene Hau . Lene Vestergaard Hau is a Danish physicist and educator. She is the Mallinckrodt Professor of Physics and of Applied Physics at Harvard University.She was also awarded tenure in 1999 and is now Mallinckrodt Professor of Physics and Applied Physics at Harvard. In 2001 she became the first person to stop light completely , using a Bose–Einstein condensate to achieve this. Sun, 09 Nov 2025 21:07:00 +0330 nicetoview nicetoview.blogfa.com/post/378 https://nicetoview.blogfa.com/post/377 A retinal tear or break happens when the gel-like vitreous in your eye pulls on your retina and causes a split . Your retina is a thin layer of tissue that’s sensitive to light found at the back of your eye. A retinal tear isn’t the same as a retinal detachment. A retinal tear could lead to a retinal detachment if the tear isn’t treated. A retinal detachment happens when the retina pulls away from the tissues that support it. Thu, 23 Oct 2025 19:22:14 +0330 nicetoview nicetoview.blogfa.com/post/377 https://nicetoview.blogfa.com/post/376 Does a concussion affect your eyesight? A concussion can affect vision by damaging the eyes themselves, muscles that surround the eyes or parts of the brain involved in vision. Even small vision changes can affect your daily life by making it difficult to read, drive, exercise, and carry out work or school activities. As an athlete, experiencing a concussion can be a scary and unsettling experience. Wed, 01 Oct 2025 17:54:00 +0330 nicetoview nicetoview.blogfa.com/post/376 https://nicetoview.blogfa.com/post/375 Phantom Eye Syndrome is NOT a multi-million dollar summer blockbuster movie. It is a real medical condition that many patients report after one eye has been surgically removed. What is a phantom vision ? Phantom vision was manifest by the transient belief that visual sensations were present in the absent eye. This phenomenon was never spontaneously divulged; in all instances the visual sensations had to be specifically elicited. Sat, 13 Sep 2025 18:57:00 +0330 nicetoview nicetoview.blogfa.com/post/375 https://nicetoview.blogfa.com/post/374 When looking at a vibrant field of flowers, if all is well with your eyes the colors may pop. But what if you begin to notice that in some parts of the visual field the colors are somewhat muted or things are starting to look gray? You know you haven't experienced any kind of eye injury but feel as if something must be amiss. Dimness of vision can be a symptom connected to a variety of eye conditions. Mon, 08 Sep 2025 20:20:00 +0330 nicetoview nicetoview.blogfa.com/post/374