Laser Eye Surgery Pros and Cons

Laser Eye Surgery Pros and Cons

The laser eye surgery is the surgical procedures that are usually performed to correct vision problems which may include nearsightedness, farsightedness, astigmatism, and presbyopia which reduces the dependence on the prescription of eyeglasses and contact lenses.

To perform a laser eye surgery is a big decision, and it is very important to make sure it’s the right decision before doing it. Below listed are the pros and cons that need to be considered before going ahead with a laser eye treatment:

Pros and Cons of Laser Eye Surgery

Pros of Laser Eye Surgery

  1. Safe and painless

The Laser eye surgery is a very safe if performed by an expert surgeon on patients for good candidates for treatment.

The laser eye procedure is actually quite painless because of the anaesthetic eye drops your surgeon will apply beforehand. There is a feeling of pressure for about 20 seconds while the femtosecond laser is used. There may be some discomfort after surgery as your eyes heal, but this will end soon.

  1. Quick

Though you will have to wait in the queue for about an hour and a half, the procedure for the surgery will take around 9-10 minutes for both eyes. Since, the lasers are only active for approximately 30 seconds per eye, it is very quick with no hospital stay required.

  1. Rapid visual recovery

Many of the patients have an drastic change in the vision immediately after surgery. Within 4 hours almost all patients have better than 20/20 vision.

  1. No more broke glasses or contact lenses

With vision problem, it is sure that lenses or glasses are part of your daily life. So, it means that there are high chances of losing them or breaking them. One of the main benefits of the surgery is that you no longer have to be dependent on glasses or lenses. As the laser eye surgery is a permanent treatment, you will never have to worry about the risks of contact lenses or broken glasses anymore.

  1. No more frequent doctor visits

While wearing glasses or lenses, you frequently have to visit the doctor and pay for eye tests, lenses and frames for the rest of your life. By choosing the laser eye surgery you’ll get a a permanent treatment with one fixed cost.

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Cons of Laser Eye Surgery

  1. Risk of complications

There may arise some complications after the laser eye surgery. The complications with laser eye surgery are very rare but the risk of complications can be minimized by choosing a world-class eye hospital with the very best ophthalmic surgeons. Always make sure you choose the surgeon and clinic very carefully for the best treatment

  1. A couple of days off work

Laser eye surgery is a very quick procedure, but it is best to take some time away from work. The number of rest days depends on the individual circumstances and the type of work that you do. It is better to follow the advice of your surgeon

  1. Big investment

The cost of laser eye surgery can seem can be considered as an big investment. That’s why many hospitals offer a range of monthly finance options to help make vision correction affordable for everyone.

  1. Not a miracle cure

Laser eye surgery can improve dramatically, but don’t expect miracles. The dependence on glasses is reduced slowly, and you  find yourself using them for some specific tasks, such as reading small print or driving.

  1. Side effects

There may have some side effects like dry eyes after your treatment. However, to help the eyes heal, your surgeon will give you eye drops to help manage this. These effects will reduce significantly after the first month following treatment, and will continue to improve.

Pros and Cons of Lithium Ion Batteries

Pros and Cons of Lithium Ion Batteries

Batteries as the source of power have been our undeniable part. Everything that doesn’t run directly from the wall socket, is definitely powered by batteries. The battery being the portable source of power has been very famous in every gadget, household appliance, and can even power small device to a bigger house.

Lithium-ion (Li-ion) batteries are essential to our energy-dependent lifestyle. We put on watch on our wrist, mobile phone in our pocket and other devices as well. They come in two types, rechargeable and non-rechargeable power source. It has been a couple of decades since the commercial debut of rechargeable lithium-ion batteries and today they are dominant in the market as the top choice of portable power. They can be constructed in various shapes and sizes, making it the most preferred one to squeeze the battery even in the tighter of the spaces. The batteries are lighter than their alternatives. Like every other technical component, Li-ion battery to isn’t untouched with the disadvantages.

Lithium Ion Batteries Pros and Cons

Pros and Cons of Lithium Ion Battery

Image: AZoM

Though the battery is widely used one and is being used for over two decades, there exists equally valued pros and cons. The pros and cons of lithium-ion batteries are given below.

Pros

  • High energy density:

Greater energy density is the chief advantage of Li-ion battery. The devices available in the markets are shrinking in size and need to survive longer between the charges as well, so having the higher density Li-ion battery will help them keep size small and charge holding capacity relatively high.

  • Self-discharge:

The batteries tend to lose their charge much faster when not in use. But with Li-ion batteries whose self-discharge charge is very low than the existing batteries in the market, the problem of self-discharge is highly minimized.

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  • Priming:

Some batteries out there have a need to be priming. Priming is the method of fully charging and fully discharging a battery. But Lithium-Ion battery has no such need. Therefore, li-ion battery saves a significant amount of time and hassle of charging and discharging before they can actually be used.

  • Low Maintenance:

Many batteries out there require frequent battery check by the means of charging and discharging even when not in use. This ensures that there is no memory effect, due to which the batteries start holding less charge. But memory effect doesn’t happen with li-ions, so, there is relatively lower maintenance required with Li-ion cells.

  • Variety of types available:

Li-ion batteries can be manufactured in a variety of types. Some devices require higher current density like in mobile devices and some require high current level like in power tools. Hence, li-ion batteries can be manufactured suiting every device’s needs and wants. This technological advantage has made the li-ion battery the ideal to use the battery.

  • Quick charging:

Unlike other batteries, li-ion batteries take a fraction of time to charge which makes it feasible to use. For example, you can charge your mobile device batteries at the higher speed just by choosing the chargers that can safely charge the battery with a higher current. But other batteries might just take longer time for similar capacity battery.

Cons

  • Protection required:

Li-ion battery and cell require a protection circuit to protect the battery from being overcharged and discharged too far below. The circuit protects the battery by not getting it deflected too far from the safe current limit. Though modern technology has the protection circuit either within the battery or in the device for protection.

  • Expensive:

The li-ion batteries are almost 40% expensive to manufacture than nickel-cadmium batteries. This makes the li-ion battery expensive than the nickel-cadmium and other batteries.

  • Ageing:

The Li-ion batteries suffers from the ageing effect. The charge holding duration is affected by the age of the battery and also the charging cycle. Some manufactures mention the maximum charging cycle of the battery as well. When the battery needs to be stored, the battery can be better charged up to 40-50% and stored in a cool place to increase the life.

  • Transportation:

Transporting the li-ion batteries is relatively risk task, specially by air. Although the battery is transferred in the luggage, but there must be a special care taken to avoid the batteries from short circuiting and should be kept in protective cases.

  • Immature technology:

The li-ion battery is still in the development phase, the manufacturers are constantly researching and trying to produce batteries with higher capacity. It doesn’t work out every time though, under an unfavorable condition of heat, no ventilation, high current flow and others, the battery might explode as well and catch fire. We have seen many incidents of a mobile battery exploding.

Conclusion

Every technology has its own sets of advantages and disadvantages. The cons of the technology cannot be eliminated completely but necessary steps can be taken to minimize the cons. By understanding the positives and negatives of the li-ion battery technology, we can make better choices of using the appropriate ones in the appropriate devices.

Death Penalty Pros and Cons

Death Penalty Pros and Cons

Death penalty is the greatest level of punishment one could ever have in their life. Also known as capital punishment is a legal punishment is a legal process where the state sends a death row inmate to execution as a punishment for a grave offense committed. The death penalty is given in such criminal offense where the crime is as comparable as taking lives. The death penalty is given in many cases according to the rules and regulation of a country. But the death penalty pros and cons are different according to a different person.

In some countries, it is still in practice while in the United States, it has been abolished in some states and still observed in several other states. There are many countries where the death penalty has been long abolished and another form of punishment instead of the death penalty is applied. Its use continues to divide into two parts as pro-death penalty and anti-death penalty supporters. The pro-death penalty supporters see the death penalty as the most suitable punishment and effective punishment for the worst crimes to mankind. While the anti-death penalty supporters see the punishment as inhumane and expensive. China and USA are among the countries with the most executions. Murder and drug trafficking are the most common crimes that are punishable by the death penalty, although adultery, witchcraft or other political activism can also be committed for the death penalty in some part of the world.

Pros and cons of the death penalty

The world is divided into 2 parts as the supporters and haters of the death penalty. Many countries have already abolished the death penalty while it is still in practice in many other. Some of the pros and cons of the death penalty are given below.

Pros of Death Penalty

  • Lower cost opposed to life imprisonment without payroll

The death penalty is not expensive for a government as it is for the life imprisonment without payroll. While there is no clear contention that the death penalty cost less than life imprisonment, life imprisonment is accumulatively higher the expenses of food, health care and other costs for sustaining life in prison.

  • It deters would-be criminals

The death penalty for certain crime determines the crime rate. According to a study in the late 60’s, there was 7% increase in crime rate after the law was abolished. While the crime rate decreased significantly with an increase in the death row who were executed each year.

  • It is quick, painless and humane

The process of execution is quick and painless, so any discussion about the death penalty being inhumane and unusual is not valid. Giving the death penalty is totally different from the process that is carried out.

  • It’s just a punishment

The death penalty is just a punishment that is given against the crime committed related the harm to life or similar offense. The right to life and freedom is for everyone and whoever tries to do any harm to those rights is punishable. Crimes like murder, rape, and assault committed by perpetrators who have no regard for life and property of others. Since they violate other’s lives, it is fair that they are brought to justice and suffer the fate they rightfully deserve.

  • It appeases the victims or victims’ families

The death penalty can provide the victim or victims’ family some help in overcoming the suffering they had to go through because of the culprit. The sense of justice alone provides help in overcoming the suffering.

Cons of Death Penalty

  • Innocent people are wrongly executed

The biggest disadvantage in the death penalty is that sometimes justice is wrongly provided. Sometimes innocent people are wrongly involved in the crime and the death penalty is provided to the innocent. Hence, execution is sometimes considered the inappropriate solution to crime.

  • It is a form of revenge

While many think it is just a punishment, the opponents argue that it is a form of revenge on the crime committed to another individual. Tit for tat principle can be considered in many other senses, but “an eye for an eye will make the whole world blind” and that’s a fact. A kill for a kill is unconstitutional.

  • Rehabilitation failure

Putting someone in death penalty closes every door for the criminal to acknowledge his mistake. A life imprisonment is far more painful and would at least provide a criminal time to acknowledge their mistake and help them bring changes in their behavior through the realization.

  • The death penalty is not cost-effective

At a glance, the death penalty might seem a cheaper option, but when all practical and legal costs are considered, it is much costlier than imprisoning for the lifetime. Plus, the criminal gets enough time to change their behavior that might shorten their time in prison.

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Conclusion for death penalty pros and cons

You can have an argument for both the pros and cons of the death penalty, but none of them are completely wrong or right. Death penalty sometimes is very essential to establish law and order in a country, while it can be replaced in many other cases where it is definitely not necessary. A death penalty must be the ultimate option when no other punishment seems to be fair enough for the culprit. The right of every individual must be kept intact, a verdict must be made in such a way.