May 17, 2020

Optometry's best opthalmic instruments

Admin
3 min
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Written by Joshua Adams Working as an assistance under a certified ophthalmologist has had its own benefits and I sure have understood a lot about how...

Written by Joshua Adams

 

Working as an assistance under a certified ophthalmologist has had its own benefits and I sure have understood a lot about how eye specialists are able to give the best treatment to their patients. So many years of study and practice has given them the ease to handle with patients and their apprehensions on getting eye treatment done. There are also other things – instruments – ophthalmic instruments that are a huge assistance when it comes to treating complicated operations and are of extreme help to the doctor.

 

Below I am sharing some of the optometric equipment I think you should know about so that you are aware of what is treating you next time you visit your doctor:

Ø  Retinal Camera

The retinal camera is a specialized, low-power microscope equipped with a camera that has been designed to take pictures of the interior surface of the eye. This allows doctors to take a close look at the patient’s retina, macula, optic disc, posterior pole and other parts of the eye. Today’s retinal cameras are equipped with digital cameras that provide high definition photographs for doctors to examine. All of this data obtained from retinal cameras helps doctors/ophthalmologists to diagnose and monitor the advancement of the eye disease.

Ø  Photocoagulation Laser

A corneal cell counter is optometric equipment which is another type of advanced imaging microscope used by ophthalmologists to examine a patient’s internal eye structures. Unlike the retinal camera, however, a corneal cell counter employs advanced spatial techniques to render the images it takes as three-dimensional structures. Ophthalmologists can then use these 3D renditions to analyze and monitor diseases. Many of today’s corneal cell counters can also conduct automatic cell-analyses and other analytical functions to help detect ailments. 

Ø  Corneal Cell Counter

A corneal cell counter is another type of advanced imaging microscope that is used by ophthalmologists when they want to examine a patient’s internal eye structures. A corneal cell counter, however, employs advanced spatial techniques to render the images it takes as three-dimensional structures. Ophthalmologists can then use these 3D images to analyze and monitor any possible eye diseases. Many of today’s corneal cell counters can also conduct automatic cell-analyses and other analytical functions to help detect ailments for easy understanding. 

Ø  Wavefront Aberrometer

A wavefront aberrometer is a piece of equipment that combines different kind of imaging technologies, including pupillometry, keratometry, wavefront imaging, autorefraction and topography. The job of the wavefront aberrometer is to detect if there are any aberrations in the eye. The images obtained are displayed on an LCD screen at high-contrast, so that the aberrations can be easily zeroed down on and easily analyzed. 

Ø  Laser Ophthamoscope

I am sure you must have seen at least an ophthalmoscope. They are shaped very small, handheld devices that the doctors use to shine a light into your eyes during routine physical exams. The ophthalmoscope allows doctors to take a look on the inside of your eye to make sure it looks healthy. Laser ophthalmoscopes are advanced models of traditional microscopes that use laser light absolute detail and accuracy.

About the Author

Joshua Adams works as an apprentice for senior ophthalmologist and also has been assisting in eye surgeries. With a bachelors and masters degree specializing in the eye surgery arena, Joshua wishes to be a full time eye surgeon and an eye consultant.

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Jun 17, 2021

Peloton vulnerable to cyber attacks, McAfee research finds

cyberattack
fitness
Cybersecurity
verification
3 min
​​​​​​​Software security experts McAfee discovered exercise bikes by Peloton are vulnerable to cyber attacks, which the company have since resolved 

Peloton, the popular exercise bikes, were found to be vulnerable to cyber attacks according to the latest research from McAfee. 

For those still unfamiliar with Peloton, it is a brand of electric bikes that combines high end exercise equipment with cutting-edge technology. Its products use a wi fi connection to connect to a large tablet that interfaces with the components of the exercise device, and provides an easy way for physical activity enthusiasts to attend virtual workout classes over the internet several times a week.

“Behind the scenes is a standard Android tablet, and this hi-tech approach to the exercise bikes has not gone unnoticed. Viral marketing mishaps aside, Peloton has garnered attention recently regarding surrounding the privacy and security of its products. So McAfee decided to take a look for themselves and purchased a Peloton Bike+.

The problem

Researchers looked at Android devices, and uncovered a vulnerability  that could allow an attacker with either physical access to the Bike+ or access during any point in the supply chain to gain remote access to the bike’s tablet, including the camera, microphone and personal data. 

To the user there would be no indication the Bike+ has been tampered with, potentially putting Peloton’s 16.7 million users at risk of  being hacked.  

The flaw was found in the Android Verified Boot (AVB) process, leaving Peloton open to attackers. 

They were able to bypass the Android Verified Boot process, which normally verifies all code and data within the system before booting. Researchers were able to get the device to boot bypassing this step. 

This can lead to an Android OS being compromised by an attacker who is physically present. Even worse, the attacker could boot up the Peloton with a modified credential to gain privileges, granting them access to the bike remotely. 

As the attacker never has to unlock the device to boot it up, there would be no trace of any access they achieved on the device. This type of attack could also happen at any point from construction to warehouse to delivery, by installing a backdoor into the Android tablet without the user ever knowing. 

The solution

Given the simplicity and criticality of the flaw, McAfee informed Peloton even as auditing was ongoing. The vendor was sent full details,  and shortly after, Peloton confirmed the issue and subsequently released a fix for it. 

The patched image no longer allows for the “boot” command to work on a user build, mitigating this vulnerability entirely. Further conversations between McAfee and  Peloton confirmed that this vulnerability is also present on the Peloton Tread exercise equipment. 

Peloton’s Head of Global Information Security, Adrian Stone, commented on the research: “this vulnerability reported by McAfee would require direct, physical access to a Peloton Bike+ or Tread. Like with any connected device in the home, if an attacker is able to gain physical access to it, additional physical controls and safeguards become increasingly important.

"To keep our members safe, we acted quickly and in coordination with McAfee. We pushed a mandatory update in early June and every device with the update installed is protected from this issue.”

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