Aspheric Lenses - Optometry Today

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21/09/12 20/04/12 CET
to weight quiet and activities overall cosmetic (eg, result puzzles will be and the with polynomial special lenses needs, would may be a be good nervous. option. lenses In this which case provide leave the visual door and open cosmetic or
colouring) areas of most rather concern than to allowing the patient. children Unlike Consider allowing children to visit the benefits have another for patients. member Unlike of spherical staff join lenses, you.
minus lenses, the finished blank size of a In summary
to become excited by playing with practice before their first appointment, aspheric lenses flatten progressively from
positive lens plays an important role in dictating Aspheric lenses do not necessarily provide better the centre to the lens margin. This results
active items. Remember that children to meet the staff and see the room Conclusion
the thickness of the lens when glazed. The optical performance than best form lenses, in lenses of reduced thickness, which are
may resent being dragged away from a where the examination will take place. In order to successfully test children,
avoidance of unwanted decentration is vital but simply provide comparable performance consequently more lightweight and confer
toy corner to have an eye examination. There are children’s books about eye it may be necessary to purchase tests
and by combining minimum substance uncuts without the restrictions imposed by best form decreased peripheral visual distortion. Aspheric
Think about the equipment on display in tests
along with using aspherical surfaces, optimum base curve available selection. so However, consider the loaning advantages a specifically designed for the age group.
lenses can be ordered in high index materials
your results examination can be obtained. room. Only Is plastics it unfamiliar should be book of aspheric at the lenses time over the spherical parent makes lenses are: the Of equal importance is the attitude
7
for the ultimate in attractive thin lenses.
and considered scary? for Is high it computerised hyperopes due to and the highly volume
attractive of material to involved; inquisitive glass lenses fingers? would Can prove you
place very heavy unnecessary and unsafe. equipment A hard and MAR behind coating a
screen? should be Can dispensed you replace on the your lenses information
order to
posters prevent unwanted with reflections. children’s Lenticular pictures? lenses
appointment. • Flatter than the Some best practitioners form spherical surface create
their • Elimination own leaflets of large especially amounts of oblique for children.
Staff astigmatism training may be needed as not
everyone • Decreased has spectacle a natural magnification/ rapport with
children.
minification
Ensure
as shape
that
factor
all
is
members
reduced
of staff
of all staff, the practice environment
About
and the
the
approaches
author
taken to make
Eirian the entire Hughes experience is the dispensing child-friendly.
optician in
charge of teaching dispensing to final year BSc
optometry About the students author at the School of Optometry
can be considered, not only standard lenticulars • Increased field of view
Arrange your appointment book to are familiar with child protection issues and Maggie Vision Woodhouse Sciences, Cardiff is senior University. lecturer She
but also blended lenticulars, or even polynomial • Reduced lens thickness
avoid unnecessary waiting and to give and local protocols (see the College of is at a the module School tutor of Optometry for paediatric and optometry Vision
aspheric lenticular lenses too. Polynomial lenses • Reduced edge substance in negative lenses and eye care for people with learning
flexibility. Some practitioners like to Optometrists’ guidelines on examining Sciences, Cardiff University, where she
give the main advantage of an absence of a • More lightweight
disabilities for the MSc in clinical optometry.
reserve one whole session per week for the
ring scotoma and Jack-in-the-box effect which • Good
younger
off-axis
child
optical
and
performance
consider studying specialises in paediatric optometry.
Her BSc and PhD are in medical biochemistry.
children.
normally occurs
For
at
older
the edge
children,
of a strong
reserving
positive
the • Controlled e-learning distortion module on safeguarding She runs the Special Assessment
after-school lens. Frame selection appointments is also important can be to useful. ensure children • Better cosmesis provided by DOCET). It is Clinic, which caters for patients of all
When the shape the and appointment the size does is made, not lead it to may overly be
helpful great edge to discuss and/or centre parental thickness. concerns For and this
determine prescription, whether 1.5 Omega an extended hard and MAR or second coated
good practice to ensure that a child is
never Conclusion alone with a member of staff.
This Aspheric extends lenses to are the a examination; highly useful group ensure of
References
ages with disabilities. Her particular
See interests www.optometry.co.uk/clinical. are visual development Click on the in
article children title and with then Down’s on ‘references’ syndrome to download. and the
appointment might be needed. Remember that a parent or guardian comes into impact of visual defects on education.
to allow time during the examination to the examination room with the child.
Module questions Course code: C-19559 O/D
explain what is going to happen and after This may not always be possible eg, a References
PLEASE NOTE There is only one correct answer. All CET is now FREE. Enter online. Please complete online by midnight on October 19, 2012 – You will be unable to
the submit examination exams after to this discuss date. Answers the to outcome
the module will parent be published may on need www.optometry.co.uk/cet/exam-archive. to take a distracting See CET points www.optometry.co.uk/
for these exams will be uploaded to
with Vantage both on the October child 29, 2012. and Find the out parent(s).
when CET points sibling will be uploaded outside, to Vantage or an at www.optometry.co.uk/cet/vantage-date
older child may clinical. Click on the article title and
Some 1. Which children, of the following particularly is NOT a conic those section? not want the parent to 4. accompany Which of the following them. measurements then on ‘references’ is NOT required to download. when
a) Oblate ellipse
dispensing aspheric lenses?
b) Asymptote
a) Horizontal centration
c) Circle
b) Vertical centration
d) Module Hyperbola questions Course code: C-18705 O/D
d) Inset
PLEASE 2. Which NOTE of the There following is only one is NOT correct an answer. advantage All CET of is aspheric now FREE. lenses? Enter online. Please complete online by midnight on May 18, 2012 – You will be unable to submit
exams a) Lighter after in this weight date. Answers to the module will be published on www.optometry.co.uk/cet/exam-archive. 5. Which British Standard CET points defines for aspheric these exams lenses? will be uploaded to Vantage
on b) Reduced May 28, 2012. spectacle Find out magnification
when CET points will be uploaded to Vantage at www.optometry.co.uk/cet/vantage-dates
a) BS EN ISO 13666
c) More curved lens form
b) BS EN 166
1. d) Diagnosing Cosmetically a more congenital appealing colour vision defect in early childhood c) Uses c) BS a flashing 2738 colourful target
has the following benefits EXCEPT:
d) Uses d) BS a large EN ISO target 7998
a) 3. The Which defect of the can following be treated is the dispenser’s rule for aspheric lenses?
b) a) Teachers For every can 5° of understand pantoscopic a child’s tilt, vertical colour centres choice should in artwork be decentred 2mm 3. Success 6. Which in eye of the health following examination is MOST of likely a young to improve child may the be optical improved and if
c) down Inappropriate career plans can be avoided
the practitioner:
cosmetic quality of aspheric lenses?
d) b) Alternatives For every 1° to of colour pantoscopic coding tilt, can vertical be used centres should be decentred 1mm a) Asks a) A the photochromic child sit as lens still as possible for as long as it takes
down
b) Asks b) A the hard child coat to keep looking at an interesting picture on the wall, no matter
2. c) Measuring For every 2° eye of pantoscopic movements tilt, in vertical children centres is likely should to be decentred more 1mm whatc) A mirrored coating
successful down if the practitioner:
c) Uses d) An a slit-lamp anti-reflection and a Volk coating lens
a) d) Moves For every the 2° target of pantoscopic very slowly tilt, vertical centres should be decentred 2mm d) Examines sections of the eyes in separate intervals
b) down Avoids distracting the child by speaking
4. Practice preparation may include all of the following EXCEPT:
a Novartis company
Find Find out out when when CET CET points will will be be uploaded to to Vantage at at www.optometry.co.uk/cet/vantage-dates