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Mohamed Ibrahim
44 Views ยท 2 years ago

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Perfect for patient education purposes.
All images/videos by Alila Medical Media are for information purposes ONLY and are NOT intended to replace professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.

LASIK, or "laser-assisted in situ keratomileusis," is the most commonly performed laser eye surgery to treat myopia, hyperopia and astigmatism. The goal of the treatment is to reshape the cornea to correct the refractive error of the eye.
The cornea is the transparent dome-shaped structure in front of the eye. The cornea refracts light and accounts for about two-thirds of the eye's total optical power. Altering the curvature of the cornea changes the way light rays enter the eye. As a result, the light rays can be focused properly onto the retina for clearer vision.
For nearsighted people, the laser is used to flatten the cornea. For farsighted people, the cornea is made steeper. For patients with astigmatism, the laser is used to smooth the irregularly-shaped cornea into a more regular shape.
The outer layer of the cornea - the epithelium โ€“ is capable of replacing itself within a few days after being damaged or removed. The deeper layer of the cornea โ€“ the stroma, on the contrary, is a permanent corneal tissue with very limited regenerative capacity. The stroma, if reshaped by a laser, will remain that way permanently.
In this procedure, a thin, circular "FLAP" is created in the surface of the cornea to gain access to the permanent corneal tissue. This can be done with a mechanical cutting tool called a microkeratome, OR, for a blade-free experience, by a femtosecond laser. An excimer laser is then used to remove some corneal tissue to reshape the cornea. Excimer laser uses cool ultraviolet light beams to vaporize microscopic amounts of tissue in a precise manner to accurately reshape the cornea. The excimer laser is computer-controlled and is programmed based on the patientโ€™s refractive error. The flap is then laid back in place and is allowed to heal.
LASIK eye surgery is mostly painless and can be completed within minutes. Improved vision can usually be seen overnight.

PRK, or photorefractive keratectomy, was the first type of laser eye surgery for vision correction and is the predecessor to the popular LASIK procedure. In PRK, NO flap is created. Rather, the epithelial cells on the eye surface are simply removed. An excimer laser is then used to reshape the cornea just like it does in LASIK.
The vision correction outcomes of PRK surgery are comparable to those of LASIK, but the recovery period is longer. This is because the epithelium is completely removed in PRK and it takes a few days to regenerate. PRK patients also have more discomfort and haziness of vision in the first few days after the surgery. Improved vision also takes longer to achieve.
PRK does, however, offer certain advantages. Because PRK does not involve creation of a flap, which contains both epithelial and deeper stromal tissue, the entire thickness of the stroma is available for treatment. The treatment range is therefore higher. This is particularly useful for patients with high levels of myopia or for those whose cornea is too thin for LASIK. PRK is also free of flap-related complication risks.

samer kareem
2,439 Views ยท 2 years ago

Physiological & pathological breath sounds

hooda
23,817 Views ยท 2 years ago

Watch that video of Doctors Removed 30 Pounds Of Poop From Manโ€™s Colon

academyo
12,065 Views ยท 2 years ago

Third video about sarcoidosis. Please see my website for disclaimer.

samer kareem
8,108 Views ยท 2 years ago

Acanthamoeba keratitis is a rare disease in which amoebae invade the cornea of the eye. It may result in permanent visual impairment or blindness.

Alicia Berger
9,996 Views ยท 2 years ago

Smoking and Breast Feeding

nurse
54 Views ยท 2 years ago

I talk about 5 Essential Skills you need as a nurse. These skills are timeless in the fat that you will always need to use them at some level. Of course specific skills are good to have as well but these skills are universal and can help you in other areas of life as well.

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Hi Guys! My name is Crosby Steen. I am a Nursing Educator, and ER Travel Nurse. I do videos on daily science based news and travel, with the goal of providing value for you in science based education and travel nursing. Any questions hit me up in the comments or Email below.....

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samer kareem
10,329 Views ยท 2 years ago

Alicia Berger
1,344 Views ยท 2 years ago

Mumps Signs Symptoms Complications

Alicia Berger
1,669 Views ยท 2 years ago

Alzheimer Disease Effects

samer kareem
19,645 Views ยท 2 years ago

Thumb Tip Regeneration! IV3000 Wound Dressing for Thumb / Finger Trauma

samer kareem
4,066 Views ยท 2 years ago

Splenectomy is a surgical procedure to remove your spleen. The spleen is an organ that sits under your rib cage on the upper left side of your abdomen. It helps fight infection and filters unneeded material, such as old or damaged blood cells. With the da Vinci Surgical System, Dr. Olson operates through just a few small incisions. The da Vinci System features a magnified 3D high-definition vision system and tiny wristed instruments that bend and rotate far greater than the human hand. As a result, da Vinci enables surgeons to operate with enhanced vision, precision and control.

M_Nabil
18,812 Views ยท 2 years ago

Continuous Connell Pattern Suture

Surgeon
39 Views ยท 2 years ago

UPDATE 2/6/15: A new version of this animation is now available! https://www.youtube.com/watch?v=E1ljClS0DhM

This 3D medical animation depicts the surgical removal of the appendix (appendectomy) using laparoscopic instruments. The surgery animation begins by showing an inflamed appendix (appendicitis), followed by the placement of the laparoscope. Afterward, one can see the surgical device staple, cut and remove the inflamed appendix. Following the removal of the appendix the abdomen is flushed with a sterile saline solution to ensure all traces of infection have been removed.
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academyo
19,803 Views ยท 2 years ago

The video will shed some light on fungal infections. Please see disclaimer on my website.

DrPhil
22,915 Views ยท 2 years ago

Full complete clinical examination of the chest, lungs and respiration with breath sounds

samer kareem
11,905 Views ยท 2 years ago

The veins around your anus tend to stretch under pressure and may bulge or swell. Swollen veins (hemorrhoids) can develop from an increase in pressure in the lower rectum. Factors that might cause increased pressure include: Straining during bowel movements.

samer kareem
12,343 Views ยท 2 years ago

The National Institute of Allergy and Infectious Diseases explains food allergy and offers tips on how to manage the condition.

Mohamed Ibrahim
13,496 Views ยท 2 years ago

tongue lipoma info

samer kareem
1,159 Views ยท 2 years ago

No condom prevents pregnancy or sexually transmitted diseases (STDs) 100% of the time. But if you and your partner are having sex, nothing protects against STDs better than a properly used condom. For those having sex, condoms must always be used to protect against STDs even when using another method of birth control.




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