CLSA Eye Witness Spring 2011 - (Page 13)

Babes in contact lenses Congenital cataracts occur in 1.7 of 10,000 births and can be bilateral or unilateral. Causes include genetics, metabolic disorders, birth trauma, and maternal infection during pregnancy. Unlike in adults, use of intraocular lens implants in infants to replace the crystalline lens is controversial. Because the first year of life is critical to visual development, Figure 3. Eyelid formation in human embryo at 8 weeks gestation contact lenses are fit 7 to 10 days after surgery, with soft lenses as the most common solution to restoring aphakic vision. Keeping in mind that a new baby’s world is close up, add 2D to 3D to the final prescription to enhance Figure 2. Cross section of embryonic human eye at 8 weeks gestation. Pink area is the corneal epithelium, and blue is the inner layers. near vision. Avoid tight fitting lenses because the child will spend a great deal of time sleeping with them. Fitting infants with contact lenses for any vision probmonths just to begin, and it will mature 6 months after lem presents some logistical challenges. Infants cannot birth. As the retina and lens develop, the vitreous forms be told to sit still or look at a target. They do, however, between them. In the mean time, the neural connections respond to voice recognition, touch and smell. Try to between the eye and brain have been developing, taking spend some time holding and speaking softly to the baby 5 months to complete. before beginning procedures. Instead of a slit lamp, use a pen light and magnifier or a lighted magnifier to evaluate From birth to beyond the lens. Work quickly when inserting and removing the Even after 9 months of simultaneous, rapid fire tissue lens to help keep the child calm. Remember that this is formation, the eye is not completely mature at birth. In adan emotional time for parents who may overreact to the dition to growth of the orbit, changes to the crystalline lens baby’s cries. and final maturation of the macula, pigmentation of the iris Generally, follow-up visits are scheduled for 24 hours may not be complete for a year. Corneal curvature changes after the initial lens insertion, then every 1 to 2 weeks afterafter birth, too. Average keratometry readings in infants are ward for lens removal, cleaning and disinfection. Parents about 54D on the first day of life and flatten to about 48D should apply lens lubricant every morning and night. at 1 year of age. What’s more, the brain’s accurate interpreAfter about 4 to 6 weeks, instruct the parents in lens tation of visually transmitted images seems to take a little care, insertion and removal. Advise parents to look for practice. redness, discharge and the infant rubbing or reaching for It is normal to find low levels of hyperopia in infants. his eyes. Show parents how to identify a de-centered lens, Hyperopia greater than 3D occurs in 25 percent of newand the methods to re-center it. Provide them with written borns. Refraction of 4D is found in 9 percent of infants at information on key points and a 24-hour phone number 6 months. By 7 to 9 months it falls to 5 percent and confor assistance. Whenever possible, provide parents with a tinues to decline to 3.6 percent at 1 year of age. As can be spare pair of lenses. Subsequent follow up visits depend on expected with corneal curvature changes, the incidence of the specific medical issues, but keep in mind that the astigmatism, usually with the rule, is higher in the first year corneal curvature changes quickly during the first year. of life. The incidence decreases from 1-1/2 to 3 years of Considering the intricate processes of human eye age as the cornea flattens. development and the many chances for error along the Instances of anisometropia are common at birth but way, vision is the most amazing of our senses. As eye care decrease quickly with age. If all the components of the eye professionals we have the rewarding work of picking up grow proportionally, any refractive error decreases. Myowhere nature may have left off. pia, however, seems to rebound. As is the case with hyperopia, infants born myopic will become less so. However, the tendency is for myopia to increase into the higher ranges once the child begins school. EyEWitnEss spring 2011 | c o n ta c t l e n s s o c i e t y o f a m e r i c a | w w w. c l s a . i n f o 13 http://www.clsa.info http://WWW.CLSA.INFO

Table of Contents for the Digital Edition of CLSA Eye Witness Spring 2011

CLSA Eye Witness Spring 2011

CLSA Eye Witness Spring 2011 - (Page Cover1)
CLSA Eye Witness Spring 2011 - (Page Cover2)
CLSA Eye Witness Spring 2011 - (Page 1)
CLSA Eye Witness Spring 2011 - (Page 2)
CLSA Eye Witness Spring 2011 - (Page 3)
CLSA Eye Witness Spring 2011 - (Page 4)
CLSA Eye Witness Spring 2011 - (Page 5)
CLSA Eye Witness Spring 2011 - (Page 6)
CLSA Eye Witness Spring 2011 - (Page 7)
CLSA Eye Witness Spring 2011 - (Page 8)
CLSA Eye Witness Spring 2011 - (Page 9)
CLSA Eye Witness Spring 2011 - (Page 10)
CLSA Eye Witness Spring 2011 - (Page 11)
CLSA Eye Witness Spring 2011 - (Page 12)
CLSA Eye Witness Spring 2011 - (Page 13)
CLSA Eye Witness Spring 2011 - (Page 14)
CLSA Eye Witness Spring 2011 - (Page 15)
CLSA Eye Witness Spring 2011 - (Page 16)
CLSA Eye Witness Spring 2011 - (Page 17)
CLSA Eye Witness Spring 2011 - (Page 18)
CLSA Eye Witness Spring 2011 - (Page 19)
CLSA Eye Witness Spring 2011 - (Page 20)
CLSA Eye Witness Spring 2011 - (Page 21)
CLSA Eye Witness Spring 2011 - (Page 22)
CLSA Eye Witness Spring 2011 - (Page 23)
CLSA Eye Witness Spring 2011 - (Page 24)
CLSA Eye Witness Spring 2011 - (Page 25)
CLSA Eye Witness Spring 2011 - (Page 26)
CLSA Eye Witness Spring 2011 - (Page 27)
CLSA Eye Witness Spring 2011 - (Page 28)
CLSA Eye Witness Spring 2011 - (Page 29)
CLSA Eye Witness Spring 2011 - (Page 30)
CLSA Eye Witness Spring 2011 - (Page 31)
CLSA Eye Witness Spring 2011 - (Page 32)
CLSA Eye Witness Spring 2011 - (Page 33)
CLSA Eye Witness Spring 2011 - (Page 34)
CLSA Eye Witness Spring 2011 - (Page 35)
CLSA Eye Witness Spring 2011 - (Page 36)
CLSA Eye Witness Spring 2011 - (Page Cover3)
CLSA Eye Witness Spring 2011 - (Page Cover4)
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