Eye size of the premature infant around presumed term

Fledelius, Hans C.

doi:10.1007/978-94-009-0601-3_21

Cited by 5 publications

(11 citation statements)

References 3 publications

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“…The result is in accordance with the decellerating growth of brain and eye in the perinatal period (Delmarcelle et al 1976, Ehlers et al 1981, Fledelius 1989. Logically, therefore, the best fit should not be a regression line, but other mathematical approximations are harder to achieve.…”

Section: Discussionsupporting

confidence: 81%

Pre‐term delivery and the growth of the eye An oculometric study of eye size around term‐time

Fledelius¹

1992

Acta Ophthalmologica

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Refraction and axial eye dimensions, evaluated by ultrasound measurements, were investigated in 101 pre-term infants and 25 full-term controls. Gestational ages in the pre-term group ranged from 25 to 34 weeks, birth weights from 728 to 2480 g. All were seen in the eye clinic due to risk of developing retinopathy of prematurity. Age at examination was 36-54 weeks (gestationalkonceptional) in the pre-terms and 37.3-50 weeks in the term infants. Adjusted to a 40 weeks axial length value (based on an assumed avarage eye elongation of 0.14 mm per week) the term-values were similar, 17.02 and 17.03 mm in the two groups. Within the premature group, however, the 40-week ajusted axial lengths were shorter, the shorter the gestational age. The study demonstrated more foetal anterior segment proportions, with flatter anterior chambers and thicker, more spheroid lenses in the preterm infants. Probably this explains the early preponderance of myopia in that group, at feature eventually to disappear, and not to be confused with myopia of prematurity. As compared to the full-terms a correlational disturbance by pre-term delivery was further indicated by the absence of the usual correlation between axial length and refractive value.

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Section: Discussionsupporting

confidence: 81%

Pre‐term delivery and the growth of the eye An oculometric study of eye size around term‐time

Fledelius¹

1992

Acta Ophthalmologica

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“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] In a Danish study of eye size around term (week 40) we found no significant difference between PT and FT groups, but within the PT group there was a trend of shorter axial length (AL) for those of a very low gestational age (GA) at delivery. 17,18 With the introduction of the retinopathy of prematurity (ROP) classification in 1984, 19 subsequent clinical and biometric studies subdivided PT findings according to the presence and severity of the retinal disorder (Table 1). Changes in the ROP profile over time have been marked by the immense progress of care and therapy within neonatology, and also by the expanding ophthalmic experience gained from the routine surveillance for ROP in infants at risk.…”

Section: Methodsmentioning

confidence: 99%

“…For this purpose regression slopes of averaged growth were used, with 0.18 mm elongation per week added when examined at a PCA earlier than week 36, and by weekly steps of 0.16 mm subtracted when older than 36 weeks. 11,17,18 An infant lid speculum was used; otherwise, a handheld applanation tonometer (Perkins Mk2 Tonometer; Veatch Instruments, Tempe, AZ; to exclude buphthalmic states and blowing up eye size) was the only contact procedure carried out prior to the ultrasonography.…”

Section: Methodsmentioning

confidence: 99%

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Eye Size in Threshold Retinopathy of Prematurity, Based on a Danish Preterm Infant Series: Early Axial Eye Growth, Pre- and Postnatal Aspects

Fledelius

2012

Invest. Ophthalmol. Vis. Sci.

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“…With continued eye growth the cornea flattens, the lens attains a flatter shape and is positioned more posteriorly, with the combined result of a refractive change towards hyperopia. This more than equalizes the myopia-producing effect of the axial eye elongation taking place in the same period of life (Fledelius 1988).…”

Section: Refraction In Prematures Myopia Of Prematuritymentioning

confidence: 98%

Ocular features other than retinopathy of prematurity in the pre‐term infant

Fledelius¹

1990

Acta Ophthalmologica

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218 premature infants born 1985-87 in Frederiksborg County were followed in the eye clinic, mainly due to the risk of developing retinopathy of prematurity (ROP). The median gestational age was 33 weeks, the median birth weight 1.750 g. ROP being analysed elsewhere, emphasis is on a) retinal haemorrhages (long-standing in 11) and vitreous bleeding (3 cases); b) the oval shape of the pre-term optic disc, considered a true finding and not merely an optical artifact; c) the pre-term presence of the optic disc cup, otherwise considered of about-term development; and d) refractive state, with myopia as a prevailing finding at post-conceptional ages shorter than 40 weeks. A shift towards hypermetropia became obvious after 2-3 months. Only 4 cases deserved the label myopia of prematurity, the criteria being early recording of ROP and persistent myopia (for more than 18-24 months).

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Eye size of the premature infant around presumed term

Cited by 5 publications

References 3 publications

Pre‐term delivery and the growth of the eye An oculometric study of eye size around term‐time

Pre‐term delivery and the growth of the eye An oculometric study of eye size around term‐time

Eye Size in Threshold Retinopathy of Prematurity, Based on a Danish Preterm Infant Series: Early Axial Eye Growth, Pre- and Postnatal Aspects

Ocular features other than retinopathy of prematurity in the pre‐term infant

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