I DON’T WANNA DO THIS ANYMORE
i feel like i’m in WAY over my head.
(context: got to the math review section of the textbook)
i’m electing to ignore it for now, and jump straight to the anatomy portion because i just want to succeed.
((once again u do not have to read LOL unless u want to see my slow descent into madness))
for example- did you know that it’s not actually your Pupil dilating and constricting with light? it’s actually your iris itself (the coloured part of the eye).
the average radius of the eye is 12mm! which means the diameter is 24mm! that’s kind of interesting!
i actually finally found my notes from my opt tech cert exam
now that i know WAY more than i did in april.. ciliary body .. that’s such a weird roundabout way of explaining it LMFAO. in all technicality it does control IOP, in the way that it forms the uveal tract with the ora serrara, which drains aqueous, in turn controlling your intraocular pressures. i dont know, that’s just such a weird way to explain it LOL.
OH THANK GOD I HAVE THE LAYERS OF THE CORNEA IN HERE BECAUSE I COULD NAWT REMEMBER THEM LOL they are, as follows:
-epithelium
-bowman’s layer/membrane
-stroma
-descemet’s layer/membrane
-endothelium
man did i really need to know All of this LOL I DONT REMEMBER THERE BEING THIS MUCH VOCAB INVOLVED. i think my cert exam asked me what OS meant like 3 different times honestly.
MY DIAGRAM
OH THANK GOD LOL I’M SO HAPPY
side note why was my handwriting so bad
this defines high IOP as 21mmHg or greater, i don’t really think that’s exactly true? i mean it Is but it’s not always indicative of glaucoma, it could also be caused by other things.
oh i just realized my textbook never mentioned diabetic retinopathy. that’s something that i deal with almost every day at work (screening for it anyways, i think i’ve only seen it like once or twice). basically in diabetics, when your blood sugar isn’t controlled properly, it can block the blood vessels in the retina, and the retina will attempt to grow new blood vessels (which is bad).
I’VE SEEN PTERYGIUM BEFORE (it’s said like terr-ridge-ee-um, btw. i distinctly remember writing it on a sticky note, bringing it to the doctor in his office, and saying “how the FUCK do you say this). it’s a growth on the conjunctiva, it’s super cool looking (not cool to have tho).
i have all my contact lens vocab too thank GOD. i love how they define a “disposable” contact, technically ALL contact lenses are disposable, it just depends on how long you can save them for. mine are daily disposables, bc i don’t wear contacts often enough to warrant needing a 2 week or monthly lens. the most common i’ve seen are 2 week and monthly lenses- there are also rigid gas permeable lenses, which you can use for up to a year, but they scare me and i don’t want to deal with them. they’re called that bc they’re not like a soft contact lens like you’re used to, they’re kind of like… i don’t know how else to describe them but hard LMFAO that’s what they are though. they scare me idk how people wear them but RGP wearers SWEAR by them and usually refuse to wear anything else. i’m also a baby about contact lenses I NEVER THOUGHT I WAS SCARED TO TOUCH MY EYE UNTIL I STARTED WEARING CONTACTS i’m so bad at taking them out. i’m fine with my right eye, but getting my left lens out is always a struggle fsr. i think it’s because i use my left hand. it’s actually shockingly difficult to injure your eye taking a contact out though (that’s what i tell people when i’m teaching how to use them anyways. obviously exercise caution but still.) there’s also extended wear contacts, that you can sleep in and stuff, but my general rule of thumb is Don’t sleep in contacts even if it says you can. it’s too risky to warrant the convenience. i fell asleep in my contacts ONCE (actually it was after one of our calls- the one where i was super sick lol) and i woke up like “wow i can see! … WAITOHFUCK-“. it’s just not worth it LOL it can lead to irritation and infections and other icky stuff.
OH I HAVE OPHTHALMIC VOCAB IN HERE???? it’s amazing how much i’ve forgotten LOL NOOOO GOTTA DRILL IT INTO MY SKULL UGH.
my very crude drawing of an eyeball. i know, i’m an artist.
not going for super intense realism here- just need to get my point across LMFAO
did YOU know (i did know this but i forgot) that you don’t blink up and down? you actually blink from side to side- it’s a gentle motion from temporal to nasal (so outside to inside). it creates a sort of circular motion of tears in your eye to help lubricate and nourish the eye, while also flushing debris to the canthus to be disposed of. PRETTY COOL HUH. try blinking super slow- you can feel the motion of it. also sorry if i’ve now made you hyper aware of your blinking :p
i went and looked this up, this isnt in my book yet, but blepharospasm is the medical term for excessive blinking(i Don’t have this. i dont think.). we’ve done 4 calls together but you probably haven’t thought to notice - i blink a LOT. like an excessive amount, you’re supposed to blink on average 15-20 times a minute - my coworker timed it one day, i blink about 96 times per minute, give or take. i don’t have dry eye, i’ve been tested for it in the past— it’s a tic, so just a neurological thing. when i was a young teen a doctor was pretty sure i have transient tic disorder (kind of a subset of tourtette’s), and that was what was causing my blinking, as well as other tics (i.e.: sniffing, clearing my throat, scrunching my nose, raising my eyebrows, jerking my neck, etc etc). but we never followed up on it. and another doctor thought it was anxiety and we Also never followed up on that. so i dunno! i just blink a lot idk it’s just how i am.
ALSO ALSO this i did not know, your eyebrows are built Very very specifically. the hairs grow laterally, and the arch of the eyebrow is there to help redirect stuff like rain sweat etc. from the eye down to the cheeks so it doesn’t get in your eyes! (please save the “BUT EMMA YOU HAVE NO EYEBROWS—“ jokes, i know, and Yes i do get sweat in my eyes often thanks for asking). i guess i did know it logically but seeing it explained like that i was like OH INTERESTING. i never thought about it actively lol.
my notes today are very pretty btw
there are so many muscles to remember. i’m starting to get stressed about going for a doctorate LOL this is so silly. one thing at a time emma.
also (this is so unrelated i’m so distracted today- idk why i took my medicine. mayb it’s just an off day), my mom and i, once again, are the exact same person. i’m SO obsessive about my notes, it’s taking everything in my power to not rip this page up and start again because i scribbled One thing out. the logical solution is to use pencil but 1. no pretty colors and 2. i can’t see pencil as well. when i was in school i used to spend HOURS rewriting my notes- the only thing stopping me from doing that is Time. i might get a second notebook and rewrite all of my notes a bit neater, but that’s so time consuming, and i work full time, AND i’m on a mild time crunch with this program. it’s hurting my SOUL kevin i want my notes to be PERFECT. no one will see them but me but STILL. i could take them on my ipad, but i’m a pen and paper kind of person always have been. i can’t focus taking notes on a screen - that’s why i never used my computer in class in school. i’ll never understand how kids these days do it with the chromebooks in the classrooms. … oh god i think i’m old now.
I WOULDN’T HAVE TO KEEP CROSSING SHIT OUT IF IT WASNT SO GOD DAMN HARD TO SPELL OH MY GOD 😭😭😭😭 ORBICULARIS LIKE WTF IS THAT 😭😭😭😭
two full pages of notes on eyelids feels unnecessary. fun fact- eyelids are VERY fucking complicated.
-levator palpebrae superioris elevates and retracts the upper lid
-orbicularis oculi muscle closes the eyelids
-müeller’s muscle is controlled by sympathetic nerves— when you’re awake it contacts and lifts the eyelid, when you’re tired or asleep it relaxes, allowing the eyelid to sag/droop
i will never remember this shit. I KEEP SAYING THAT but i’m shockingly actually taking this all in pretty well. i’m being told to take a couple day’s break but i have WAY too much anxiety to be able to do stuff like that. i would like to get through taking notes on this whole textbook pretty soon, so i can study really hard and hopefully take my first exam by the middle of next month. i’m kinda rushing it a little but i do not plan on taking 2 years to do this. that’s my biggest red flag, i’m a very impatient person. when i want something i want it quickly, and i want this Very badly.
i’m challenging my obsessive tendencies - i’ve switched pen types for my notes. that seems so weird and not important but i’m MAD obsessive about what kind of pens i use for my notes - it has to be the SAME exact type of pen (ballpoint vs. gel). i’ve switched to a gel pen so i don’t have to press down as hard, i was starting to really hurt my wrist. i’m MOVIN UP IN THE WORLD KEV WHO NEEDS THERAPY AM I RIGHT (i do. desperately. in fact i have an introductory appointment next month 🎉🎉🎉🎉 aren’t you proud of me???? 2024 is the year of taking care of my physical and mental health, i’ve already decided).
i’m revealing a lot abt my obsessive tendencies lol. i don’t have OCD, i just have certain compulsions. like swallowing an even amount of times, touching a door after i open it, etc etc. … maybe that is OCD. it doesn’t negatively impact my life tho, it’s not like tapping a pencil against a wall every time i answer a math question (my brother used to do that- he Does have OCD). i’m just funny about some stuff is all.
ANYWAYS OPTICS!
i’m learning about the fibrous tunic of the eye- the outer layer, containing the sclera and the cornea. the sclera is made of tough inelastic fibers, that can resist intraocular pressures without losing its shape, and provides an anchor for extraocular muscles. the cornea, unlike the sclera, has fibers that are all parallel, making it transparent. FUN FACT: the cornea has no blood vessels in it— that way it can stay transparent. it gets nutrients from surrounding areas of the eye by diffusion, and also from limbal blood vessels, precorneal tear film, the aqueous humor, and the choroid (which is Exclusively blood vessels). file under: things only emma finds interesting.
oh my god the cornea .. this is getting a little … LOL. my eyes are crossing. it’s just so much information.
D means Diopters of power by the way- that’s how we measure refractive power.
i didn’t know the cornea was this fucking important THERE ARE SO MANY MEASUREMENTS how will i remember this. i truly don’t need to know all of this for opticianry, but again, if i want a head start on a doctorate, i should be familiar.
i’m realizing how stupid i actually am, i saw this:
“μm”
like 3 times and i was like.. what the fuck am i looking at.
that’s a micrometer, btw. in case u were curious. CUZ I SURE WAS.
i’ve also been spelling thick like “thicc”, just to feel something.
omg my ass is numb. this is hell. this one is pretty tough to sit thru. ITS INTERESTING its just so. intricate. part of me wonders how tf humans figured this shit out honestly. its so precise.
my highlighters are already somehow drying out, i got them last week. i have a feeling i’m gonna kill a lot of these things doin this. idek why i highlight stuff, i just think it looks pretty. breaks up the WALLS of fucking black ink i guess.
fun fact: bowman’s layer is acellular- it has no cells in it. it is “a modified superficial stromal layer). … idk if that’s a FUN fact, but it’s a fact for sure.
i am fighting demons. good thing i skipped the math for now, my brain is FRIED. i just wanna get thru this.
THEY SAY WORDS EXPECTING ME TO KNOW WHAT THEY ARE. WHAT IS “EMBRYOLOGY”. i’m assuming to do with embryos.
this makes no sense. “developed during embryology” embryology is not a developmental stage, it’s an area of study.
alright i’m on descemet’s membrane. hopefully almost done with the cornea for the love of god.
it’s a TRUE basement layer- resistant to penetration. i, too, am resistant to penetration (sorry…)
OH i found smthn interesting - the endothelium is the most interior layer of the cornea. its made of these hexagon shaped cells - you’re born with about 400,000 of these, and you don’t produce any more thru ur life. you lose them very gradually as you age but it shouldn’t affect your vision normally. there’s no treatment or cure for vision loss due to low cell numbers — i wonder if maybe that’s something they’re using stem cells to research. there’s controversy regarding the use of stem cells isnt there?
i guess you can only cure it with a full corneal transplant — very cool!!!!
… resisting the urge to go research corneal transplants. i’ve wasted enough time today UGH. put it in my notes to ask the doctor at work about it. moving on now.
oooo gross! corneal edema (fluid retention in the cornea) can develop to where the epithelium forms blisters that rupture! gross! it’s called bullous keratopathy.
ok i’m dying less so right now, this is getting interesting. i THINK my big interest in ocular health is ocular diseases, and age related degeneration of the eye. i think it’s fascinating. mother nature and all. and ocular diseases are just fascinating to me - again, not to Have obviously, but really cool to learn about and see the effects of. that makes me sound insensitive I’M SORRY LOL I THINK IT’S SUPER INTERESTING. i’ve always been like this, i used to watch emergency room and medical documentaries with my mom when i was like 11. my favorites were the ones where a camera follows around people in the birthing suite - i was watching live births in 5th grade for fun, i was a weird ass kid. my mom loved it though, she was the exact same as me - morbidly fascinated by the medical world. side note : they used to show that shit on cable TV, i have no clue if they still do stuff like that but i think they should. makes for a more well rounded person .. or a freak of nature like me, take ur pick LMAO.
ok i have to admit, the cellular shit is interesting. if i want to be a doctor of refraction i’m gonna have to take organic chemistry, which is All about cellular organisms, so i better get used to it and fast :|
oh, another interesting thing (to me only): corneal guttata is the age-related dystrophy of the endothelial cells i was talking about earlier — apparently mostly prevelant in females! something to look forward to in my future i suppose 🥴
oooo kevin i’m about to put the fear of god in ya - ocular surgeries and laser treatments can further decrease these endothelial cell numbers 🫵🏼🫵🏼🫵🏼🫵🏼 (i’m clearly fucking w you, i’m sure lasik isn’t going to lead to blindness u r totally fine)
3 types of centeal corneal guttae (guttars) are known - primary central corneal guttae, fuch’s dystrophy, and secondary corneal guttae .. and it didn’t give me a definition for that last one, so naturally, me being me, i Had to go on google and find it for myself.
i can’t believe it’s already 3 pm, i’m fighting for my absolute LIFE today omg. i’m supposed to RELAX on my days off, instead i’m doing MORE OPTICAL SHIT THAN I DO AT WORK. UGH. why am i doing this to myself.
WE’RE DONE WITH THE CORNEA. EVERYONE CHEERED.
i was really startin to go thru it with this one.
if they’re going this in depth with the extraocular structures, i’m scared for when they get to the intraocular structures JESUS lord alive.
made the mistake of taking a break and now i’m sleepy. i wanna take a nap but it’s too late in the day to do that uuuuuugh. the bitch of living.
DONE WITH THE ANTERIOR SEGMENT FUUUUUUCK onto the middle tunic of the eye. god eyeballs are so INVOLVED HOLY SHIT
god the sentence “anterior portion of the middle tunic” made my brain bleed for some reason. the first part of the middle part 😵💫😵💫
DING DING DING QUIZ TIME i mentioned in previous posts that i have an issue with my eyes- what was it?
if you said “accommodative infacility” UR RIGHT! it involves the ciliary muscles!!!! also known as accommodative inertia (according to wikipedia), the muscles can’t change accommodation fast enough from distance to near! ding ding yay! the ciliary muscles constrict to look at a distance object, and relax to look at a near object. mine don’t do that fast enough, and also do it Too Much to make up for the lack of speed.
idk if you do this too, whenever i spell diaphragm, i always say “dia-frag-um” in my head LOL.
thank god, something that’s straight forward. the two muscles in the iris are the sphincter muscle and the dilator muscle. hmm wonder which one does which.
OH THIS IS INTERESTING everybody has brown pigment on their iris ! certain people just have less than others (i.e., blue eyed people, obviously, have the least amount).
omg the inner tunic. the retina. SMTHN I KNOW A DECENT AMOUNT ABOUT YAY i also just realized i was supposed to be doing laundry today lol oops. too lost in the sauce.
i’m sure you know what rods and cones are - i always forget which is which but i think i’ve got it now.
-rods are responsible for lowlight/night vision
-cones are reponsible for color vision
there are 3 types of cones—
•more sensitive to shorter wavelengths ((blue))
•more sensitive to mediun wavelengths ((green))
•more sensitive to longer wavelengths ((red))
very interesting!!!! i think so anyways. rods are located more in the front and center of the retina, while cones are more in the posterior and the macula (that’s why you don’t have color vision at night, isn’t that cool)
I Am Going To Off Myself.
extraocular muscles. also known as extrinsic muscles. my new sworn enemy, i’ve decided.
also it’s 730 at night and i’m just starting laundry teehee. oops
oh hey kev. yea i’m fuckin losing it right now.
ok im done im going to sleep goodbye forever it’s almost 11pm and i work a 9 hour shift tomorrow time to pass away until further notice BYE
~emma-elayne, brain like scrambled eggs
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