Talk:Ommatidium

Wiki Education Foundation-supported course assignment
This article was the subject of a Wiki Education Foundation-supported course assignment, between 3 April 2019 and 7 June 2019. Further details are available on the course page. Student editor(s): Honggglee. Peer reviewers: Andrn10.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 05:40, 17 January 2022 (UTC)

Untitled
Can they detect color? —The preceding unsigned comment was added by 138.88.247.75 (talk • contribs).

Recently I found a series of papers by L. P. Yaroslavsky where it is demonstrated that, for determining the direction to the light sources, even an array of low-noise Lambertian photosensors (i.e., with a 180-degree fild of view) combined with a mighty-enough brain, can give good results. Given this physical result, the statement in the aricle ("it is important for the ommatidia to react only to that part of the scene directly in front of it") is not accurate. It is thus an interesting question whether any non-trivial post-processing of "blurry" image data actually occurs in an insect's brain (i.e.: are the papers by L. P. Yaroslavsky actually relevant to real-world insects). So, it would be interesting to see a directly measured angular sensitivity diagram of real-world ommatidia. P.S. I am a physicist, not a biologist. Alexander Patrakov (talk) 08:03, 22 August 2008 (UTC)

Unclear: (1) what species is being discussed, especially as number of ommatidia vary accordingly (2) also: ungrammatical
"To prevent light entering at an angle from being detected by the ommatidium it entered or by any of the six neighboring ommatidia, six pigment cells are present."

Might be speaking about flies following on from previous para. So prospectively, I divided the previous para into 2 para so the Fly para is set off on its own just before the unclear one.

Anyone able to help here?

Pandelver (talk) 17:41, 5 March 2011 (UTC)

Flies with 7 rhabdomeres
I've spent a fair amount of time now looking for anything that links to this as I feel that it should have a citation/reference attached. Any clues as to where this originated? — Preceding unsigned comment added by Aidanomatic (talk • contribs) 15:59, 12 January 2013 (UTC)

The inner 90% of the ommatidium
This sentence:


 * The inner 90% of the ommatidium contains 6 to 9 (depending on the species) long and thin photoreceptor cells in the case of some butterflies[3] often abbreviated "R cells" in literature and often numbered, e.g. R1 through R9.[3]

needs to be re-written. The lack of punctuation makes it impossible to parse correctly. Are they photoreceptor cells only in the case of some butterflies? Or are they often abbreviated "R cells" only in the case of some butterflies? Or perhaps they're numbered R1 through R9 only in case of some butterflies.

This ought to be separated into two sentences, and clarity given as to what exactly is "in the case of some butterflies." Unfortunately, I personally don't know what the answer is, otherwise I would do this myself. Ge0nk (talk) 03:53, 15 May 2014 (UTC)

Size
"The size of the ommatidia varies according to species, but ranges from 5 to 50 micrometres." What dimension does "size" refer to? Length? Diameter? Kajabla (talk) 01:31, 22 October 2014 (UTC)

Peer review by Andrew: section on butterfly and drosophila compound eye
For the paragraph describing about the butterfly's ommatidium, you may want to start off with a topic sentence that introduces the butterfly compound eye since this section is not particularly about butterflies.

Citations seems to be good here.

For the second paragraph, I recommend to split it into two paragraphs: one about the Drosophila eye and another about the retinal cell fate determination. I'm not sure whether this cell fate determination applies only for drosophila or to all organisms with the compound eye. You can even create a subsection for the biological mechanism/development alone. Andrn10 (talk) 02:00, 13 May 2019 (UTC)

Responding to reviewer’s comments
Thank you for your detailed feedback. It was a good suggestion to create a subsection for the biological mechanism/development alone. I created at subsection labelled "Mechanism of Eye Determination". I also added a sentence to introduce the topic of butterfly compound eye (I tried to expand on the difference in the structure of ommatidium between butterflies and Drosophila). Honggglee (talk) 21:59, 30 May 2019 (UTC)