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Changes in intraocular pressure during reading or writing on smartphones in patients with normal-tension glaucoma
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  • Published on:
    Intraocular pressure change during reading or writing on smartphones in patients with normal-tension glaucoma
    • MAYURI BORGOHAIN, Glaucoma fellow Sri Sankaradeva Nethralaya
    • Other Contributors:
      • PRAFULLA SARMA, Senior consultant
      • SHAHINUR Tayab, Associate consultant
      • Chengchira SANGMA, Junior consultant
      • Suklengmung Buragohain, DNB trainee

    The editor
    We would like to congratulate and highly appreciate Ha et al. for this simple and innovative study on ‘Changes in intraocular pressure during reading or writing on smartphones in patients with normal tension glaucoma’. However, we have few queries and seek your kind attention.
    First, out of 38 trabeculectomised eyes, 12 were not using any anti-glaucoma medications whereas remaining was on some antiglaucoma medications. An overall analysis was done including all trabeculectomised eyes. However, we think, it would have been better analyzed if the authors had compared eyes with or without antiglaucoma medications separately. We are interested to know the pattern of intraocular pressure (IOP) fluctuation in eyes with trabeculectomy not using any antiglaucoma medications.
    Second, in this present study, no control group was included.
    Third, it was established that there is circadian pattern of IOP change in normal tension glaucoma patients. Therefore, we are interested to know whether IOP was measured in all patients at the same time of day or was it measured at different times of the day.

    1. Ha A, Kim Y K, Kim J et al. Changes in intraocular pressure during reading or writing on smartphones in patients with normal-tension glaucoma. Br J Ophthalmol. 2019;
    2. Lee Y R, Kook M S, Joe S G et al. Circadian (24- hour) pattern of intraocular pressure and visual...

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    Conflict of Interest:
    None declared.