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Contact lenses of different manufacturers need to be handled differently

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SANA MAHMOOD

 

KARACHI: It was Mona-Liza famed Leonardo da Vinci who presented the novel idea about contact lens to replace glasses, back in 1508, for health and cosmetic reasons. 

Initially blown glass contact lenses were used that were interestingly shaped utilizing rabbit eyes as molds. It has also been reported that few manufacturers of those lenses even used eyes of dead people to shape them.

Though hard contact lenses are here for over a century now, marketing of modern hard contact lenses (based on the older designs) on commercial level commenced in 1979.

A hybrid lens has also been introduced with a hard center surrounded by a ring of soft lens material.

While buying and using lenses one needs to keep in mind that various brands of lenses are made using different processes.

Hence these are totally different from each other. For instance, there are thick or thin lenses, high-water-content or less hydrated lenses.

Therefore, one should be very careful using them and caring for them (i.e.: storage etc.)

Contact lenses are prepared by i) spinning liquid silicone on a revolving mold till it polymerizes; ii) by injecting liquid polymer onto a rotating mold; iii) cutting a disk of polymer by means of a diamond.

You should make sure that contact lens never dries out otherwise it could stick to the surface of the eye. Since a variety of lenses, including bifocal contact lenses are available now almost everyone can use them. With some adaptation you can comfortably wear your favorite lenses. 

After the hard, soft, extended-wear lenses scientists are pondering over making bionic and telescopic lenses as well as ones facilitating administration of drugs.

Savants are of the view that futuristic contact lenses are likely to be made of new polymers.

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Health

Opioids killed nearly 4,000 in Canada last year: official

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OTTAWA: The opioid crisis claimed nearly 4,000 lives in Canada last year, mainly from overdoses of the powerful painkiller fentanyl, the public health agency said Tuesday, warning of a worsening situation.

The death toll was 34 per cent higher than the previous year, with most of the fatal overdoses involving men aged 30 to 39 who obtained fentanyl illegally from narcotics traffickers on the street. Almost 90 per cent of the 3,987 deaths in 2017 were concentrated in just three provinces: Alberta, British Columbia and Ontario. “Canada continues to experience a serious and growing opioid crisis,” the public health agency said in a report.

Fentanyl is considered 30 to 50 times more powerful than heroin and 50 to 100 times more potent than morphine. Health Minister Ginette Petitpas Taylor said “high rates of opioid prescriptions” are also a “contributing factor in the crisis.” “As minister, I am calling on industry to act now and stop their marketing activities associated with these products in Canada,” she said. The health ministry explained that while prescription opioids “can help Canadians who need them to manage pain,” marketing the drugs can unduly influence doctors and lead to “over-prescription.”

 

 

 

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Compulsive gaming triggers mental chaos

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GENEVA: Kids of this generation tend to spend their time playing video games, leaving behind physical activities that we used to do in our childhood.

Parents too are occupied in their own professional stuff and hereby could not keep their children off from playing to such addicting games.

As a matter of fact, engaging in physical activities has almost vanished from our kids’ lives and they all end up being glued to their Smartphones, tabs and PCs.

As such, the World Health Organization (WHO) reckons this convention as a hazardous enslavement, resulting into triggering mental health disorders.

According to the connoisseurs, the cases with mental conditions are exceptional with only over three per cent affected gamers at the moment.

Harbouring on the subject, director of WHO’s department for mental health and substance abuse, Dr Shekhar Saxena noted that gaming chaos should be listed as a novel concern. Moreover, there is a call for treatment for innumerable vulnerable gamers forthwith.

Contrary to the latest disclosures, health and wellness experts went on to say that not every child, who plays games, is considered an addict.

Deliberating about this matter, Dr Joan Harvey maintained that the latest ramifications might wreak havoc among parents. However, there is a need to understand that if kids tend to play video games but at the same time they also indulge in other physical activities like cycling, football, cricket etc, it is ok to let them play for some time.

In point of fact, be it a physical activity or anything, too much of everything could prove to be lethal sooner or later.

Claiming that excessive gaming impacts its savvy such badly that they end up giving up their schools, resulting in collapsing families.

Therefore, this is high time that ombudsmen must look into this matter while taking instant measures so as to create awareness among those who remain oblivious to such harmful impacts.

Also, parents, no matter how busy they are, should give proper time to their family particularly kids for their better development. As only providing them money and other materialistic stuff is not ample for making them strong beings. (Aiman Inam) 

 

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Heart patients exercising lesser than needed

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ISLAMABAD:  People with existing heart problems or who are at the risk of developing them are ignoring medical advice and are not exercising enough. Scientists from the University of Adelaide looked at the exercise habits of 3000 people from the general population in South Australia and Southern Brazil.

New medical treatments have helped people to live longer despite these health problems, but this is causing an escalating burden on public health systems worldwide. “Previous research has tended to assess the benefits of exercise habits of patients with cardiovascular disease who follow an exercise plan developed by their doctor,” said the study’s author David A. Gonzalez-Chica, appears in the journal PLOS ONE.

“There is evidence that more than 70 percent of people who suffer from or who are at risk of developing a heart condition due to diabetes, high blood pressure or high cholesterol, do not follow a proper program of regular moderate or vigorous exercise, which is critical for avoiding further complications and even mortality. “The scale of this critical public health issue is, therefore, being under-reported,” said Gonzalez-Chica.

People with heart problems are living longer – especially in high – income countries such as Australia – but their long-term quality of life is being adversely affected because they are avoiding moderate or vigorous exercise. Current guidelines suggested that at least 150 minutes of moderate or vigorous physical activity a week is recommended.

 

 

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