LPI

Abbreviation with 2 meanings

LPI
Stands forLaser peripheral iridotomy
Meanings2
CategoriesMedical, Units & Measurements
Also writtenlpi

LPI has two meanings. It stands for Laser peripheral iridotomy (ophthalmology & ENT) or Lines per inch (data unit).

Meanings of LPI at a glance

#LPI stands forContext
1Laser peripheral iridotomyMedical › Ophthalmology & ENT
2Lines per inchUnits & Measurements › Data Unit

1. Laser peripheral iridotomy

Medical · Ophthalmology & ENT Abbreviations

Office laser procedure that makes a tiny hole in the outer edge of the iris, letting fluid bypass the pupil and deepening the drainage angle. It treats and prevents angle-closure glaucoma.

Example: Narrow angles OU with occludable angles on gonioscopy; LPI OD today, OS next week.

After LPI, some patients notice glare or a line of light if the opening is not covered by the eyelid. Studies such as the ZAP trial (2019) found only modest benefit for people who merely have narrow angles without other signs. Pronounced as letters.

2. Lines per inch (lpi)

Units & Measurements · Data Unit Abbreviations

Halftone screen frequency in offset and newspaper printing: how many rows of halftone dots fit per inch. Newspapers print at roughly 85 to 100 lpi and glossy magazines at 133 to 175 lpi.

Example: Prepare images at 300 ppi for the magazine's 150 lpi screen.

A rule of thumb sets image resolution at 1.5 to 2 times the lpi, the origin of the familiar 300 ppi standard for print. The same unit describes the lens density of lenticular prints, the ridged images that change with viewing angle.

More ophthalmology & ENT abbreviations

  • HZO – Herpes zoster ophthalmicus
  • ICL – Implantable collamer lens
  • IOP – Intraocular pressure
  • LP – Light perception
  • LPR – Laryngopharyngeal reflux
  • MGD – Meibomian gland dysfunction
  • NAION – Nonarteritic anterior ischemic optic neuropathy
  • NIHL – Noise-induced hearing loss

See all 74 ophthalmology & ENT abbreviations →

More data unit abbreviations

  • GT/s – Gigatransfers per second
  • KB – Kilobyte
  • kbps – Kilobits per second
  • KiB – Kibibyte
  • MB – Megabyte
  • MB/s – Megabytes per second
  • Mbps – Megabits per second
  • MiB – Mebibyte

See all 36 data unit abbreviations →

Edited by the AbbreviationList.com team. Spotted an error or a missing meaning? Contact us.

This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.