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Lens Red
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Colour photography is now the norm, and is perfect for most situations; however, there are some times when you want the power and simplicity of a black and white photo.

Black and white photography requires a different set of skills to colour, as the picture is formed purely from areas of light and shade. These days, black and white film is increasingly hard to come by, and unless you're lucky enough to have a specialist lab near you, you'll find the sort of machine processing they do at "one hour" photo places leaves a lot to be desired when it comes to processing black and white film.

Many modern digital cameras have a dedicated black and white mode, but mostly they just desaturate the picture and make it look washed out. It often works out better to shoot in colour and convert the picture in Photoshop.

Of course, the easiest way of making a colour photo black and white in Photoshop is to convert the mode to grayscale (Image > Mode > Grayscale), but this does limit your options if you want to enhance the picture later on.

In traditional black and white photography, coloured filters are sometimes placed over the lens to create a dramatic contrast. This is done because hues that seem quite different in real life (in colour) can merge into one shade of grey when seen in monochrome. The intensity of the colours are the same, even though the actual colours are different.

For example, a blue sky with white clouds can appear weak and washed out in a black and white photograph. If you place a red filter over the lens, it will darken the blue sky and make the white clouds stand out more. This is because the red filter blocks the blue colour waves more effectively than it does colours that are nearer to red.

The great thing about Photoshop is it enables you to experiment and get the effect just right. The method I find works best involves keeping the picture in RGB mode, and adjusting one of the colour channels.

If you go to the Layers palette, click the Channels tab, then click on (say) the Red channel, you'll see an image that resembles a red filter over the lens of a camera with black and white film. The darkening of the blue tinted areas will make a moody, sophisticated image. For comparison, click on the Green channel and then the Blue. The results will be surprising -- and very different!

I like to then fine tune the result by adjusting the Levels. Keep your chosen channel selected, and then go to Image > Adjustments > Levels, and adjust the sliders until you get the desired result. Then be sure to save the picture as a new file to preserve your original.

Incidentally, if you apply this process to two channels at the same time, you can get some pretty stunning colour effects too!

Shaun Pearce is a writer and video maker. His latest production, "Photoshop Master", is an interactive video tutorial. It shows you how to get the most from Photoshop, and can be downloaded from http://www.learnphotoshopfast.com?=article7

Contact Lens Care And Examination

If you have a question about your contact lenses, you should contact your fitter.

If you experience redness, blurred vision, pain, or light sensitivity, you should contact your ophthalmologist or optometrist. (If he or she is not allowed by state law to treat eye problems, he or she will refer you to a practitioner who can handle these problems.) Normally, you will need to be seen that day. If you need to seek help, it is best to try to contact your eye doctor during the day, rather than waiting until evening or late at night.

Most ophthalmologists are available 24 hours a day via their answering service. If your ophthalmologist is not available, you should be seen by the ophthalmologist on call, or go to a hospital's emergency room.

Optometrists and opticians may or may not provide 24-hour availability. If not available, you should ask about the routine if a problem develops, especially after regular office or store hours. Many have an ophthalmologist to whom they refer medical problems; others may tell you to go to a hospital's emergency department. Recognize that emergency departments usually do not have an ophthalmologist on site.

Because of the specialized nature of eye examination equipment, contact-lens problems are best handled in the ophthalmologist's office.

Diagnosis and treatment of contact lens problems entail a complete history and an eye examination.

During the history, you are asked questions about your symptoms and how long you have been bothered by these symptoms (for example, light sensitivity, redness, blurred vision). You should also be prepared to tell your eye doctor about the type of contact lenses being worn (soft, gas permeable, or the older hard lenses).

What type of care regimen you use (cleaning, disinfecting, and rinsing solutions). This should include the specific name (manufacturer) of solutions. The type of wear regimen used: daily disposable, weekly overnight wear, or daily wear. How often the lenses are replaced (daily, weekly, monthly, quarterly, or yearly).

The examination of the eye involves checking your vision (with your glasses because you have removed your contact lenses).

If your vision cannot be corrected, your eye doctor may suspect the presence of a serious problem.

Your eye doctor looks into your eye with various types of lights, starting with a flashlight type of instrument and followed by a slit lamp (a microscope to examine the eye with high magnification and different color lights).

Your eye doctor may place a dye called fluorescein on the eye. This makes abrasions and ulcers show up clearly.

With apparently severe infections, cultures of the eye may be taken and sent to the laboratory for evaluation. Depending on the cause of the infection, specific antibiotic eyedrops may be required. Rarely, hospitalization is required.

If you experience irritation, pain, blurred vision, redness, or light sensitivity, immediately remove your contact lenses and re-evaluate your symptoms.

Because you should not wear your contact lenses when experiencing these problems, you should have an up-to-date pair of glasses for these times. With well-fitting contact lenses, you should be able to remove your lenses and see well with your glasses, essentially immediately.

Blurred vision, lasting for hours, upon removal of the contacts is usually a sign of poorly fitting contact lenses. If your vision is blurred, with your glasses, when lenses are removed, notify your fitter.

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My contacts make my eyes very red and irritated. Even different solutions and lens brands. What gives?

My vision is even a little blurry now. Should I see an optometrist? Or should I go to an Urgent Care center?

Well, hon, there are too many factors that need to be actually looked at to be able to tell if you are allergic to solutions or to lenses or if you have something else that is causing it that the contacts trigger. An Urgent care center will most likely tell you to take your contacts out, give you some eye drops and tell you to call your eye doctor. So, I think you should just call your eye doctor. We see this a lot, and it can be many different things. Good luck! I hope you have a better day!

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