Archive for January, 2010

Eyesight is a Precious Asset 2-2

Thursday, January 28th, 2010

A neglected problem: eye fatigue
More than 1/3 of Italians (37%) answer that their eyes often get tired, while only 27% state that they have never had problems on this account.
Despite this, only 9% has considered specific protective lenses. The criteria when choosing eyewear seem to be above all “lightness” and “design” (respectively 26% and 24%). The general impression we receive is that eye fatigue is not considered a pathological problem, but more a natural phenomenon which is dealt with generically by resting.
Poorly informed consumers
On the subject of lenses, however, 26% do not know what lenses their eyewear have, 23% are aware of AR coatings, 10% of the fact that lenses may be plastic and only 6% know about photochromic lenses.
When separating men and women, lens lightness is important for both, while AR seems more important for men, and infrangibility for women. Lightness is however the most determining objective feature for overall choice of eyewear (frame + lens) and is underlined by 26% of interviewees; the advice of experts -ophthalmologists (39%) or optician/optometrists (26%) is also important. The other criteria guiding choice are design (24%), which counts more than price (19%), while infrangibility is down to 13%.
Fashion as a reason for purchase
Fashion seems to be an impetus mainly guiding the choice of a frame but not that of eyewear as a whole. There is therefore a need to constantly inform consumers and also sensitize them on aspects more connected to eye protection and health, such as the adoption of suitable lenses to individual needs and lifestyles.
Little is done to protect children
As far as children are concerned, most parents (66%) state that they protect their children’s eyes (49% in the 5-8 age group; 52% in the 9-13 age group). Lastly, 17% of parents do not adopt any measures to protect the eyesight of their children. In reality, it seems that as long as they are young -i.e. more or less until they are 13 – the best protection against UVA rays is a hat!
More information, more education to prevention and protection
As already emerged in Phase 1, the research study carried out by IPSOS for Transitions Optical highlighted a fairly superficial attention by the Italian public to problems linked to eyesight, an inadequate adoption of measures to protect it and, even more, an endemic lack of information and “culture of visual wellbeing”.
This sounds like a pressing invitation to the industry, trade association and eye specialists – oculists and optician-optometrists first of all – to strengthen their commitment toward greater information, sensitization and education of the public on such crucial issues for the lives of all.

Found in Vedere International 2008

Can Blind People Imagine Colours?

Saturday, January 23rd, 2010

The vision and/or perception of coloursTHE QUESTION:

Sometimes we are asked questions to which it is really hard to give an answer: how does a blind person perceive reality?

THE ANSWER

The answer to this question is basically a philosophical one, we can only say a little about visual perception from the point of view of the traditional optics.
Since this patient has never had any “visual experience”, he will never be able to represent “reality” as a sighted person does. It is possible that shapes and colors may have a “sense” to him/her, but surely not the one we mean. To better understand (maybe) what we are saying, it may help to think about this question: how can I communicate the “concept” of a colour to a person who has never seen it?

Eyesight is a Precious Asset 1-2

Monday, January 18th, 2010

Eyesight is an inestimable, precious asset. And yet, Italians do not seem to be aware of it and, above all, be particularly careful about protecting their eyes. Transitions Optical made a research interviewing 1000 persons on the phone.
In Italy there has been a growing awareness of the importance of health and physical fitness to ensure a high quality of life. This trend does not seem to have involved the eyes and sight, as it is demonstrated by a research study carried out by IPSOS Health for Transitions Optical, a world leader in photochromic lenses. The international study, conducted in successive phases, each of which dealing with specific themes, at this stage involved four European Countries: Germany, Italy, Portugal and Spain.
In Italy the results show that around 48% of the population, i.e. 5 Italians in 10, wears spectacles or contact lenses, an important datum although 41% of the interviewees state that they have no problems with eyesight. Those who mention them place myopia in first place (31%), followed by astigmatism (14%) and, in third place, presbyopia (9%). The first part of the research (published in May 2007) also revealed the lack of concern for the effect of solar rays on the eyes. Consequently, the study underlined that as many as 16% of the interviewees do not use any protection or aid to protect their eyes during exposure to the sun. Moreover, a worrying 37% had expressed the erroneous conviction that damage to the eyes is reversible.
Let’s concentrate on the second stage of the study, made public last October.
Eyesight protection is in third place. Only 39% of Italians (36% men and 42% women) consider that maintaining the efficiency of their eyesight is considered halfway between the very important and the unimportant ones, thus revealing a worrying situation of lack of information and sensitivity to the problem.
There is a surprising persistence of certain prejudices concerning eyesight in the minds of the Italians. For example, 7 Italians out of 10 are ignorant of the fact that as much as 80% of the quantities of UVA rays we are exposed to during our lives takes place before the age of 18, or as many as 62% of Italians consider that people with dark eyes have fewer problems regarding exposure to sunlight! Just out of curiosity, we may add that 20% of Italians think that sunglasses may “damage” the eyes, a fact that probably has to do with many low-cost products, without warranty brands, purchased in the street, on stalls or the beach.

Found in Vedere International 2008

Contact Lenses to Highlight Eye Colour

Wednesday, January 13th, 2010

How to highlight eye colour
QUESTION

In which way can contact lenses interfere with the eye natural colour?

ANSWER

Just because lenses are NOT TINTED, they do not have any effect on the eye colour. Two brief notifications:

  • since contact lenses can enhance the light reflection, they may give the impression that iris is brightest.
  • if the lens edge coincides with iris edge, then it may seem that more emphasis is given to iris, but it’s just an impression.

Technological Innovation

Friday, January 8th, 2010

Essilor (Charenton, France) has investigated the existing correlations between the quality of wave fronts entering the eye and some subjective criteria of perception such as visual acuity and sensitivity to contrasts. The results of the experiments have led to the creation of a new lens concept based on the differentiated management of wave fronts according to the wearer’s needs in term of near, intermediary and far vision. In near vision, the posture adopted by the person may vary considerably according to the activity carried out, the surrounding environment, and the time of day. Moreover, posture changes from one individual to another, and so to be effective in all situations, a progressive lens has an enlarged area for near vision which is enlarged both horizontally and vertically. For Varilux physio, the use of wave fronts has made it possible to establish the optical characteristics of the lens in a very large area, both vertically and horizontally, and this is why the lenses are comfortable for near sight.
In the cases of intermediary vision, all the progressive lenses have a a residual astigmatism on both sides of the median line, a defect which is even greater the greater the prescribed addition. In the case of Varilux, the action deriving from the wave front has enabled the reduction of astigmatism and at the same time made it possible to orient the lens axis vertically, so as to perceive the visual field as larger. As far as distant vision is concerned, the defects (decrease in power and astigmatism) affect not only the quality of vision, but also all the serious defects, like coma for example. This type of defect is present in the far vision area also of progressive lenses but, thanks to the use of wave fronts, with Varilux coma control may be achieved. In this way defects are minimized for very large areas of far vision, including the mounting crossover area.

Found in Vedere International 2008

Contact Lenses Moving

Sunday, January 3rd, 2010

Contact lenses movings

QUESTION:

The issue arisen from this patient is really common: why do contact lenses move while in the eye?

ANSWER:

The answer is very simple, not to say banal: the contact lenses in question ARE NOT RIGHT for the eye in which they are applied.
It will be the optician’s duty to proceed with the substitution of a material which obviously is not right for the patient’s technical problem.