Petri dish Petri dish A Petri dish (sometimes spelled "Petrie Dish" and alternatively known as a Petri plate or cell-culture dish), named after the German bacteriologist Julius Richard Petri, is a shallow cylindrical glass or plastic lidded dish that biologists use to culture cellssuch as bacteriaor small mosses. Modern Petri dishes usually feature rings and/or slots on their lids and bases so that when stacked, they are less prone to sliding off one another. Multiple dishes can also be incorporated into one plastic container to create a "multi-well plate". While glass Petri dishes may be reused after sterilization (via an autoclave at
Apraxia of Lid Opening Apraxia of Lid Opening Apraxia of lid opening (ALO) is an inability to initiate voluntary eyelid opening following a period of eyelid closure, with normal function at other times. Manual lifting of the eyelid often resolves the problem and the lid is able to stay open. ALO was first clearly described as a distinct entity in 1965 as “a nonparalytic motor abnormality characterized by the patient’s difficulty in initiating the act of lid elevation… present only momentarily at the start of lid opening.” A review of reported cases has shown a 2:1 female to male occurrence, and onset usually in