There are three main categories of contact lenses, based on the materials they are made of: soft contacts, rigid gas permeable (GP) contacts, and hybrid contact lenses.
Soft contacts are made of pliable hydrophilic... moreWhat are contact Lenses made of?
There are three main categories of contact lenses, based on the materials they are made of: soft contacts, rigid gas permeable (GP) contacts, and hybrid contact lenses.
Soft contacts are made of pliable hydrophilic ("water-loving" plastics called hydrogels. Hydrogels absorb significant amounts of water to keep the lenses soft and supple.
Because of this water-loving characteristic, the water content of various hydrogel contact lenses can range from approximately 38 to 75 percent (by weight).
The water content of soft lenses allows oxygen to pass through the lenses and keep the cornea healthy during contact lens wear.
Gas permeable contacts, also called GP or RGP lenses, are rigid (hard) contact lenses. Like hydrogels used for soft lenses, materials used to create GP contact lenses also are "gas permeable," allowing oxygen to pass through the lenses to the cornea.
Unlike soft lenses, however, rigid gas permeable lenses do not contain significant amounts of water. Instead, GP lenses rely on their microscopically porous nature to transmit oxygen to the cornea.
Hybrid contact lenses have a rigid GP central optical zone, surrounded by a peripheral fitting zone made of a soft contact lens material. less
Viral Conjunctivitis :-
Causes - the most common cause of viral conjunctivitis is infection with adenovirus.
Treatment:- Applying lubricating eye drops to the eye; these are called artificial tears and are available without a prescription. Avoid using... moreViral Conjunctivitis :-
Causes - the most common cause of viral conjunctivitis is infection with adenovirus.
Treatment:- Applying lubricating eye drops to the eye; these are called artificial tears and are available without a prescription. Avoid using contact lanses.
Mild cases of viral conjunctivitis often clear up within roughly 1-3 weeks without special medical treatment.
▫️ This pose improves venous outflow, eliminating swollen legs and the feeling of fatigue. It also alleviates the suffering of those who already have sore veins.
▫️ In yoga, this asana is called... morePrevent varicose veins with a simple posture
▫️ This pose improves venous outflow, eliminating swollen legs and the feeling of fatigue. It also alleviates the suffering of those who already have sore veins.
▫️ In yoga, this asana is called "Viparita Karani. It is believed that when a person is on his feet, he gets old, but in the inverted pose, all the processes of the body go backwards, and he gets younger. It is most useful to be in this pose in silence.
Germs are always present in the oral cavity. During the night, the salivary flow decreases and therefore the acidity increases. These are favorable conditions for the growth of bacteria that give rise to such... moreWHY do we have bad breath in the morning?
Germs are always present in the oral cavity. During the night, the salivary flow decreases and therefore the acidity increases. These are favorable conditions for the growth of bacteria that give rise to such bad breath.
The situation worsens if you sleep with your mouth open.
Other causes of bad breath include: irregular brushing, use of poor hygiene products, smoking, tooth decay and some digestive diseases.
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It is caused by a malfunction of the vestibular apparatus, responsible for keeping us firmly on feet.
It reacts to changes in the position of the head and body in space, as well as to acceleration.
When a person's body moves and sways in a car or on a boat, the brain receives conflicting information from the different senses, which causes nausea, dizziness, and headaches.
M.P Shah Hospital will be taking part in this year's Somali Festival, which will be held at the National Museum from 13th to 14th April, from 10:00 am. This will be a two-day event where participants will get to experience the rich culture of the Somali... moreM.P Shah Hospital will be taking part in this year's Somali Festival, which will be held at the National Museum from 13th to 14th April, from 10:00 am. This will be a two-day event where participants will get to experience the rich culture of the Somali community as they learn about wellness and preventative healthcare.
Tuberculosis (TB)is a major global wealth concern with 10.6 million people falling ill with the disease and 1.3 million dying from it by 2022, World Health Organization (WHO) data show. Call 0709529000. #GertrudesKe
Creutzfeldt-Jakob disease(Mad cow disease ), or vCJD, is a very rare, fatal disease that can infect a person for many years before making them sick by destroying brain cells. Eating contaminated beef and beef products with the infectious agent of bovine... moreCreutzfeldt-Jakob disease(Mad cow disease ), or vCJD, is a very rare, fatal disease that can infect a person for many years before making them sick by destroying brain cells. Eating contaminated beef and beef products with the infectious agent of bovine spongiform encephalopathy (BSE) is the main cause of vCJD.
It is the most fatal disease with 100% death rates with infaction , patient die after ~ 13 months of symptoms. There is no treatment available for vCJD.
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Let's play with the situation. You find yourself near such a person. What should you do?
Patients diagnosed with bronchial asthma have medication with them to stop an attack. But it may happen that the medication... moreFirst aid for an asthma attack
Let's play with the situation. You find yourself near such a person. What should you do?
Patients diagnosed with bronchial asthma have medication with them to stop an attack. But it may happen that the medication was not there. In this case, you should not hesitate to call an ambulance.
- Ensure free access of air to the patient: take off his clothing, if possible open a window.
- Sit the sick person so he can put his hands on the edge of a chair. If the person is lying, do not lie on his side, not on his back. It is good to tilt the head.
- The person must breathe out correctly: Make long, deep breaths as if he is breathing through a straw.
- Try to calm the patient, so that he does not feel frightened or panicked.
A migraine is much more than a bad headache. This neurological disease can cause debilitating throbbing pain that can leave you in bed for days! Movement, light, sound and other triggers may cause symptoms... moreWhat is Migraine and How is it Cured?
A migraine is much more than a bad headache. This neurological disease can cause debilitating throbbing pain that can leave you in bed for days! Movement, light, sound and other triggers may cause symptoms like pain, tiredness, nausea, visual disturbances, numbness and tingling, irritability, difficulty speaking, temporary loss of vision and many more.
Migraine headaches are chronic. They can’t be cured, but they can be managed and possibly improved. There are two main treatment approaches that use medications: abortive and preventive.
Abortive medications are most effective when you use them at the first sign of a migraine. Take them while the pain is mild. By possibly stopping the headache process, abortive medications help stop or decrease your migraine symptoms, including pain, nausea, light sensitivity, etc. Some abortive medications work by constricting your blood vessels, bringing them back to normal and relieving the throbbing pain.
Preventive (prophylactic) medications may be prescribed when your headaches are severe, occur more than four times a month and are significantly interfering with your normal activities. Preventive medications reduce the frequency and severity of the headaches. Medications are generally taken on a regular, daily basis to help prevent migraines. less
Here are 10 surprising facts about the spinal cord:
1. It’s the nervous system’s HQ :-
Think of your spinal cord as the headquarters of your body’s nerves. It holds the peripheral nervous system and 43 nerve pairs, both sensory and motor. Thanks to... moreHere are 10 surprising facts about the spinal cord:
1. It’s the nervous system’s HQ :-
Think of your spinal cord as the headquarters of your body’s nerves. It holds the peripheral nervous system and 43 nerve pairs, both sensory and motor. Thanks to this system, your brain, and spinal cord are connected to all other parts of your body.
2. It controls voluntary and involuntary movements :-
The spinal cord is the reason you can lift your hand and make a fist and it’s also responsible for involuntary moving, such as breathing.
3. It’s a conductor :-
The reason you can get up and walk right now is that the spinal cord carries signals to the legs to extend, stand, and start the walking movements.
4. An injury can disrupt these signals :-
A spinal cord injury can affect the transmission of signals between the nerve cells and different parts of the body.
5. It can’t repair itself :-
While other parts of the body can regenerate and heal, the spinal cord cannot.
6. It ends in a Horse’s Tail :-
The end of the spinal cord is also called cauda equina due to its similarity to a horse’s tail. It’s located in the upper portion of the lumbar region and the nerve cells here send signals to your lower limbs and pelvic region.
7. It’s highly protected :-
You’ll be happy to know there is a vertebral column that covers and protects your spinal cord daily. Inside the column lies the spinal canal, which is the cavity that holds the spinal cord.
8. It’s divided into 31 segments
The spinal cord is quite a complex system with many types of nerve cells: cervical, lumbar, thoracic, sacral, etc.
9. It grows until you’re five years old :-
The spinal cord usually develops along with you until the age of 5. After that, your body will continue to grow around it.
10. It can function independently from the brain :-
The spinal cord doesn’t take all its signals from your brain. In some cases, it can send signals to muscles on its own.
Symptoms of slapped cheek syndrome
Symptoms of slapped cheek syndrome usually develop 4 to 14 days after becoming infected. Sometimes, symptoms may not appear for up to 21 days.
First symptoms
Some people with slapped cheek syndrome won’t notice any... moreSymptoms of slapped cheek syndrome
Symptoms of slapped cheek syndrome usually develop 4 to 14 days after becoming infected. Sometimes, symptoms may not appear for up to 21 days.
First symptoms
Some people with slapped cheek syndrome won’t notice any early symptoms, but most people will have the following symptoms for a few days:
a slightly high temperature (fever) of around 38°C (100.4°F)
a runny nose
a sore throat
a headache
an upset stomach
feeling generally unwell
The infection is most contagious during this initial period.
Adults may also feel joint pain and stiffness. This may continue for several weeks or even months after the other symptoms have passed. less
Slapped cheek syndrome
Slapped cheek syndrome (also called fifth disease or parvovirus B19) is a viral infection. It’s most common in children but it can affect people of any age. It usually causes a bright red rash on the cheeks.
Slapped cheek... moreSlapped cheek syndrome
Slapped cheek syndrome (also called fifth disease or parvovirus B19) is a viral infection. It’s most common in children but it can affect people of any age. It usually causes a bright red rash on the cheeks.
Slapped cheek syndrome is normally a mild infection that clears up by itself in 1 to 3 weeks. Once you’ve had the infection, you’re usually immune to it for life.
However, slapped cheek syndrome can be more serious for some people. If you’re pregnant, have a blood disorder or a weakened immune system and have been exposed to the virus, you should get medical advice. less
When a mosquito bites, it injects saliva containing special substances, not blood from a previous bite. HIV cannot develop in a mosquito or any other blood-sucking insect.
In many cases, however, an insect... moreWHY don't mosquitoes carry HIV?
When a mosquito bites, it injects saliva containing special substances, not blood from a previous bite. HIV cannot develop in a mosquito or any other blood-sucking insect.
In many cases, however, an insect attack can result in more than just allergies. Mosquitoes carry such unpleasant diseases as Rift Valley fever, yellow fever, Lyme disease, Dengue fever, Zika virus, leishmaniasis and, obviously, the well-known malaria.
Ultraviolet radiation is electromagnetic radiation with a wavelength between 10 and 400 nm. In fact, it is radiation which spectrum lies between the light visible to the human eye and X-rays.
... moreWHY are bacteria and microbes afraid of UV light?
Ultraviolet radiation is electromagnetic radiation with a wavelength between 10 and 400 nm. In fact, it is radiation which spectrum lies between the light visible to the human eye and X-rays.
Ultraviolet is capable of penetrating the DNA and RNA of microorganisms and destroying them, at least damaging them, significantly slowing down or preventing the reproduction of cells altogether.
For humans, exposure to high doses of ultraviolet light can cause dangerous damage to the eyes and skin.
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The reason is that cold irritates the upper palate, responsible for the nerve nodes transmitting sensations to the brain.
The blood vessels respond to cold by constricting or expanding, resulting in... moreWHY might cold food or drinks cause a headache?
The reason is that cold irritates the upper palate, responsible for the nerve nodes transmitting sensations to the brain.
The blood vessels respond to cold by constricting or expanding, resulting in pain. When you feel cold, your body sends warm blood to the cold spot, which causes pain.