A standardized logarithm of the minimum angle of resolution visual acuity chart in Hindi.

Purpose: The purpose of this study to develop and calibrate a new Hindi logarithm of the minimum angle of resolution (logMAR) visual acuity chart.

Methods: A new Hindi visual acuity chart was designed to logMAR specifications using Hindi optotypes experimentally selected to have similar relative legibility under equivalent spherical and cylindrical defocus. The chart calibration study was carried out in a large clinical setup in India.

Height, weight, body mass index and ocular biometry in patients with sickle cell disease.

Purpose: To investigate the effects of physical size on refractive error and the dimensions of optical components in sickle cell disease (SCD).

Methods: The design was cross sectional. Height and weight of adult patients suffering from SCD were measured, and body mass index (BMI) was calculated.

The effect of central corneal thickness on estimates of the anterior chamber depth.

Background: The slitlamp can be used to estimate the anterior chamber depth (ACD). The length of a slit object is increased until the corneal and iris/lens images appear to just touch. Multiplying the just-touching-slit-length (JTSL) by a conversion factor gives an estimate of the ACD as measured by ultrasonography.

Ultrasound velocity in the aqueous and vitreous humours of the one-humped camel (Camelus Dromedarius).

BACKGROUND: There are no previous reports on the velocity of ultrasound through the aqueous and vitreous humours of the one-humped camel. This information is required for determination of the depth of the aqueous and vitreous chambers and therefore the axial length. This knowledge together with other, yet to be determined, ocular dimensions will ultimately be used in drawing up a schematic eye for the camel.