Evaluation of a Pilot Protocol for Detecting Infant Hyperopia

imageSIGNIFICANCE

Highly hyperopic children are at greater risk for developing conditions such as strabismus, amblyopia, and early literacy and reading problems. High hyperopia is a common finding in infants in a pediatric medical practice, and early detection can be done effectively in that setting with tropicamide autorefraction.

PURPOSE

This study aimed to evaluate the effectiveness of a pilot screening program to detect high hyperopia in 2-month-old infants in a pediatric medical practice in Columbus, Ohio.

METHODS

Cycloplegic refractive error (1% tropicamide) was measured by retinoscopy and autorefraction with the Welch Allyn SureSight (Welch Allyn/Hillrom, Skaneateles Falls, NY) in 473 infants (55.4% female) who were undergoing their 2-month well-baby visit at their pediatrician’s medical practice. Cycloplegic retinoscopy (1% cyclopentolate) was repeated at a subsequent visit in 35 infants with ≥+5.00 D hyperopia in the most hyperopic meridian during the screening.

RESULTS

Twenty-eight infants (5.9%) had high hyperopia (spherical equivalent, ≥+5.00 D), and 61 (12.9%) had high hyperopia (≥+5.00 D in at least one meridian of at least one eye) by retinoscopy with 1% tropicamide. The mean ± standard deviation spherical equivalent tropicamide cycloplegic refractive error measured with retinoscopy was +2.54 ± 1.54 D (range, −3.25 to +7.00 D) and with SureSight was +2.29 ± 1.64 D (range, −2.90 to +7.53 D). Retinoscopy done using 1% cyclopentolate was 0.44 ± 0.54 D more hyperopic in spherical equivalent than with 1% tropicamide (P

Ordering Eyeglasses Using 3D Head Scan Technology versus Established Online and Storefront Clinic Methods

imageSIGNIFICANCE

This study investigates how a new smartphone scanning technology compares with established online and storefront vendors in providing remote measurement and adjustment of prescription eyeglasses.

PURPOSE

This study aimed to evaluate a new technology for ordering prescription eyeglasses online.

METHODS

Thirty participants with 2.00 to 2.75 D of presbyopia (aged 49 to 74 years) were asked to order eyeglasses with progressive addition lenses from four vendors: one online vendor using a new head scan technology (Topology, San Francisco, CA), two established Web site–based vendors (vendors A and B), and one storefront vendor: Université de Montréal’s Vision Clinic (UMVC). The resulting measurements were compared with those of opticians. Participant-reported preferences on visual and physical comfort of eyeglasses were collected after 15-minute trials of eyeglasses from each vendor.

RESULTS

Pupillary half-distance measured with Topology matched optician measurements, but online vendors A and B diverged (mean difference, − 0.80 mm [Z = −2.79; P = .005]). Topology and vendor B segment addition heights were similar to optician measurements, but vendor A diverged (mean, −1.40 mm [Z = −2.58; P = .01]). The personalization parameter values obtained with Topology were different from optician measurements for pantoscopic angle (−5.30° [Z = −4.12; P