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  1. Harminder Singh Dua,
  2. Arun D Singh, Editors-in-Chief

https://doi.org/10.1136/bjophthalmol-2012-301861

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    Global estimates of visual impairment

    Pascolini and Mariotti conducted a systematic review of data on visual impairment. 285 million people were estimated to be visually impaired, of whom 39 million are blind. People 50 years and older represented 65% and 82% of visually impaired and blind, respectively. The major causes of visual impairment were uncorrected refractive errors (43%) and cataract (33%). The major cause of blindness was cataract (51%). Visual impairment is a major global health issue; the preventable causes representing 80% of the total burden (see page 614).

    Corneal biomechanical properties and tonometry

    Yu et al investigated the correlation between corneal biomechanical properties, applanation tonometry and direct intracameral tonometry in 58 eyes scheduled for phacoemulsification. Corneal hysteresis and corneal resistance factor were measured with the ocular response analyser. Applanation IOP (IOPappla) was measured in the supine position and intracameral IOP (IOPintra) was measured with a pressure transducer connected to a cannula inserted into the anterior chamber. IOPintra had no association with the corneal properties. IOPappla …

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