Comparison of the Human Eye to a Camera

Comparison of the Human Eye to a Camera

The camera and the human eye have much more in common than just conceptual philosophy — the eye captures images similar to the way the camera does. The anatomy of the camera bears more similarities to a biological eyeball than many would imagine, including the lens-like cornea and the film-like retina. Similarities like these give the camera the appearance of a robotic eye. However, though there are many similarities between cameras and eyes, they are by no means identical.

Cornea and Lens

The cornea is the “cap” of the eye. This transparent (like clear jelly) structure sits to the front of the eye and has a spherical curvature. The lens of a camera is also transparent (glass) and sits at the front of the body. Like the cornea, the lens also maintains a spherical curvature. The corneal and lens curvature allows for the eye and camera to view, though not in focus, a limited area to both the right and the left. That is, without the curve, the eye and camera would see only what is directly in front of it.

Iris and Aperture

The aperture is to the camera as the iris is to the eye, and this reveals one of many similarities between cameras vs. eyes. The aperture size refers to how much light is let into the camera and will ultimately hit the sensor or film. As with the human eye, when the iris contracts itself, the pupil becomes smaller and the eye takes in less light. When the iris widens in darker situations, the pupil becomes larger, so it can take in more light. The same effect happens with the aperture; larger (lower) aperture values let in more light than a small (higher) aperture value. The lens opening is the pupil; the smaller the opening, the less light let in.

Focus in Eyes and Cameras

Both the eye and camera have the ability to focus on one single object and blur the rest, whether in the foreground (shallow depth of field) or off at a distance. Likewise, the eye can focus on a larger image, just as a camera (greater depth of field) can focus and capture a large scape.

Scope and Field of View

As the eye, the camera has a limited scope to take in what is around it. The curvature of the eye and the lens allow for both to take in what is not directly in front of it. However, the eye can only take in a fixed scope, while a camera’s scope can be changed by the focal length of different types of lenses.

Retina and Film

The retina sits at the back of the eye and collects the light reflected from the surrounding environment to form the image. The same task in the camera is performed either by film or sensors in digital cameras. This process underpins both how cameras work and how eyes work.

Source:

By Mallory Ferland

https://sciencing.com/comparison-human-eye-camera-6305474.html


Practice reopening 1st of June

We are pleased to inform you that we will be reopening the practice on the 1st of June 2020, by appointment only. For the foreseeable future, we will be operating a closed door policy to maintain social distancing. This is in line with current government and regulatory guidelines which we continue to monitor closely.

Our temporary opening hours will be Monday, Wednesday and Thursday 10am to 3.30pm. Please call or email in advance before attending.

As we prepare to reopen, the health and well-being of our patients and staff remains our priority. Strict hygiene measures, social distancing and use of appropriate PPE will continue to be in place to ensure everyone’s safety.

If you have any queries, please email us at info@uniaopticians.co.uk. Please check our ‘News’ page for full details and further updates.

As always, we remain committed to providing our patients with excellent customer care and service and look forward to welcoming you back very soon.

 

 


Half price Summer frame sale now on.

Selected frames at half price when purchased with lenses.

Selected sunglasses half price.


Maui Jim Sunglasses

Not only do Maui have an extensive range of new styles available ready-to-wear and as prescription, they also offer the Maui Reader which gives all the benefits of the ready-to-wear sunspec lens with an added reading segment.


Moscot Open Day

We are really pleased to have the Moscot sun collection in store on Thursday 13th June.

Join us for tea and cake, or perhaps a glass of something sparkling, and see the full collection of classic styles.

We will be open until 6.00pm.


Optical Coherence Tomography (OCT) capability now available at Unia Opticians.

OCT is an imaging method which is similar to ultrasound but works with light waves rather than sound. It can aid the early detection of diseases such as glaucoma and macular degeneration.

This straightforward and non invasive way of assessing detail of the retina can be used to evaluate the ocular health of both adults and children.

We are now pleased to offer an OCT scan as an extra service alongside the existing thorough eye examination.

Please visit or call the store for further details.


Lindberg buffalo horn frames now in stock.

We are excited to announce we are now stockists of Lindberg buffalo horn and wood+ horn frames.

The materials are ethically sourced, and each frame is unique.

The front of a horn frame is made of layers of laminated buffalo horn, a natural and porous material. It is impossible to produce two identical fronts. The colour choices are  light brown, medium brown, dark brown and deep black, depending on which part of horn they are taken from. Each frame will vary in texture.

Wood + horn (TRÆ + BUFFALO) fronts are made of one layer of timber (Olive, Padauk, Ebony or Smoked Oak) and a multilayer of buffalo horn-backing.

Because they are natural materials, both horn and wood+horn fronts need to be kept hydrated, as they tend to dehydrate with time. Each frame is supplied with a care kit, and we offer an annual service to ensure the quality is maintained.


MOSCOT now in store

 

 

   

We now have the iconic Moscot frames in stock, including the Johnny Depp made famous Lemtosh.

Come and view the lookbooks in store, to see the entire collection of Original and Spirit frames.

 

 


Orgreen Titanium frames now in stock

Orgreen is a premium designer eyewear brand using high-end materials, known for its signature style and innovative colour combinations. Founded in Copenhagen in 1997, their aim is to design strong and timeless frames for quality-conscious individuals all over the world. Made by hand in Japan, the frames are classic shapes in beautiful colours.

 

 

   

Call in to see the Titanium collection in store now.

 

 


Moleskine frames now in

MOLESKINE eyewear

          

An exciting new range of understated frames with ultra flat temples to fold in to an ultra flat magnetic case.

Available in both acetate and metal.