What are the standard color codes used in fundus drawings?
54 Cards in this Set retinal arterioles red white with or without pressure (label) blue crisscross inner layer of retinoschisis blue crisscross detached pars plana blue crisscross outline of change in area or folds of detached retina because of shifting fluid blue crisscross.
What is the cornea part of?
The cornea is the transparent part of the eye that covers the front portion of the eye. It covers the pupil (the opening at the center of the eye), iris (the colored part of the eye), and anterior chamber (the fluid-filled inside of the eye).
Can eyeball pop out?
Globe luxation is the medical term for when an eyeball protrudes or “pops” out of the eye socket. This rare condition can happen spontaneously or occur due to head or eye trauma. Some systemic health conditions, such as floppy eyelid syndrome and thyroid eye disease, can also increase the risk of globe luxation.
What is eye cornea?
Listen to pronunciation. (KOR-nee-uh) The transparent part of the eye that covers the iris and the pupil and allows light to enter the inside.
How do you draw a normal fundus?
Requisites for Fundus drawing: Generally, there are three concentric circles-the the innermost circles represent the areas of posterior to the equator, the middle one represents the area in between Equator and Ora Serrata and the outermost circle represents area anterior to the Ora Serrata.
What is retinal drawing?
In retinal drawings, the instructor can monitor students – areas of omission and confusion can be detected. They are advantageous over photographs – they are less expensive, provide immediate record, and highlight details that are difficult to photograph and finally help you medicolegally.
What are asteroids in the eye?
What is asteroid hyalosis? Asteroid hyalosis (AH) is a degenerative eye condition marked by a buildup of calcium and lipids, or fats, in the fluid between your eye’s retina and lens, called the vitreous humor. It’s commonly confused with synchysis scintillans, which looks very similar.
Why is my sclera blue?
Blue sclera is caused by a congenitally thinner-than-normal sclera or a thinning of the sclera from disease, which allows the color of the underlying choroidal tissue to show through it.
Why is cornea transparent?
Its transparency is a result of the homogeneity of the refractive index of all its constituent cells (Dohlman, 1971). However, it should be noted that in a number of corneal pathologies, changes in one or more of the other layers can lead to increased light scattering and consequent loss of corneal transparency.
Can a damaged cornea be healed?
The cornea is the clear area in the center of the front of the eye through which we see. When the cornea is scratched, the injury is called a corneal abrasion. Most of the time, small corneal abrasions will heal in a few days. A doctor may prescribe drops.
Is it bad to touch your eyeball?
Touching the eyes often, as well as rubbing them, can also lead to tears in the tissue; which causes the capillaries in the eyelids to break. The skin around the eyes is very delicate, and excessive touching can easily bruise the area and invite infection.
What do blind people see?
Went Totally Blind: People who have lost their sight have different experiences. Some describe seeing complete darkness, like being in a cave. Some people see sparks or experience vivid visual hallucinations that may take the form of recognizable shapes, random shapes, and colors, or flashes of light.
What holds your eye in the socket?
EXTRAOCULAR MUSCLES: These muscles originate in the eye socket (orbit) and work to move the eye up, down, side to side, and rotate the eye. The superior rectus is an extraocular muscle that attaches to the top of the eye.
Is cornea transparent?
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. Along with the anterior chamber and lens, the cornea refracts light, accounting for approximately two-thirds of the eye’s total optical power.
What is cornea function?
The cornea acts as the eye’s outermost lens. It functions like a window that controls and focuses the entry of light into the eye. The cornea contributes between 65-75 percent of the eye’s total focusing power.
What does your cornea look like?
Cornea: a clear dome over the iris. Pupil: the black circular opening in the iris that lets light in. Sclera: the white of your eye. Conjunctiva: a thin layer of tissue that covers the entire front of your eye, except for the cornea.
What is optic cup?
Optic cup: The white, cup-like area in the center of the optic disc. The optic disk is the circular area at the back of the inside of the eye where the optic nerve connects to the retina.
What is ora serrata in human eye?
The ora serrata is the peripheral termination of the retina and lies approximately 5 mm anterior to the equator of the eye. The ora serrata is approximately 2 mm wide and is the site of transition from the complex, multilayered neural retina to the single, nonpigmented layer of ciliary epithelium.
What is Crvo?
The eye’s retina has one main artery and one main vein. When the main retinal vein becomes blocked, it is called central retinal vein occlusion (CRVO). When the vein is blocked, blood and fluid spills out into the retina. The macula can swell from this fluid, affecting your central vision.
What is a Rhegmatogenous retinal detachment?
Rhegmatogenous detachments are caused by a hole or tear in the retina that allows fluid to pass through and collect underneath the retina, pulling the retina away from underlying tissues. The areas where the retina detaches lose their blood supply and stop working, causing you to lose vision.
What color is a retina?
The retina most often looks red or orange because there are many blood vessels right behind it. An ophthalmoscope allows a health care provider to see through your pupil and lens to the retina.
What are the retinal layers?
Broadly there are ten layers in Retina: 1. Retinal pigment epithelium 2. Layer of Rods & Cones 3. External limiting membrane 4. Outer nuclear layer 5. Outer plexiform layer 6. Inner nuclear layer 7. Inner plexiform layer 8. Ganglion cell layer 9.